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Reputation-based adaptive strategy persistence can promote cooperation considering the actual influence of individual behavior Phys. Lett. A (IF 2.6) Pub Date : 2024-04-16 Huizhen Zhang, Tianbo An, Jingrui Wang, Liu Wang, Jinjin An, Jian Zhao, Xing Jin
Reputation mechanisms have proved to play a crucial role in promoting cooperation. In some previous studies, reputation updates only considered an individual's past behavior or the environment in which the individual is located. In fact, an individual's reputation depends not only on past behaviors, but also on the actual impact of his/her behavior on society. Motivated by these facts, we introduce
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Solitons in optical thermal medium with power nonlinearity and feedback Phys. Lett. A (IF 2.6) Pub Date : 2024-04-15 S.E. Savotchenko
The possibility of optical soliton propagation in thermal optical medium with power nonlinearity and feedback is described theoretically. New generalization of equations describing the light propagation in such medium is proposed. Exact solutions of the considered system corresponding to the simplest solitons in the term of hyperbolic cosine are found. It is shown that the propagation constant and
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Sequentially witnessing entanglement by independent observer pairs Phys. Lett. A (IF 2.6) Pub Date : 2024-04-12 Mao-Sheng Li, Yan-Ling Wang
This study delves into measurement strategies within a scenario where multiple pairs of Alices and Bobs independently and sequentially observe entangled states. The goal is to maximize the number of observer pairs capable of witnessing entanglement. Previous research has shown that arbitrary pairs () can detect entanglement in all pure entangled states and a specific class of mixed entangled states
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Crossover effects and dynamic scaling properties from Eden growth to diffusion-limited aggregation Phys. Lett. A (IF 2.6) Pub Date : 2024-04-12 Xu Tian, Hui Xia
The diffusion-limited aggregation (DLA) model is a classical fractal aggregation model that describes numerous fractal phenomena, and the Eden model is a typical discrete growth model for investigating cell clusters, such as bacteria or tissue cultures. There is a significant difference between these two discrete models in their growth rules and dynamic scaling properties. In this paper, we introduce
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The characteristics of vortex modes in twisted fiber with dielectrically chiral ring core Phys. Lett. A (IF 2.6) Pub Date : 2024-04-12 Gebeyehu Dirbeba, Xingguang Liu, Junqing Li, Yingjie Zhang, Johnston Kalwe
A novel twisted ring core fiber incorporating chiral material into the ring core is proposed, which supports orbital angular momentum (OAM) modes. Results show that between chirality and twist rate there exist a cooperative effect in birefringence and a competitive effect in mode index bifurcation between OAM modes with different helicity. The cooperative effect between chirality and twist rate also
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Current dependence of the low bias resistance of small capacitance Josephson junctions Phys. Lett. A (IF 2.6) Pub Date : 2024-04-10 Venkat Chandrasekhar
The dc current-voltage characteristics of small Josephson junctions reveal features that are not observed in larger junctions, in particular, a switch to the finite voltage state at current values much less than the expected critical current of the junction and a finite resistance in the nominally superconducting regime. Both phenomena are due to the increased sensitivity to noise associated with the
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Quantum state fusion via generalized measurement Phys. Lett. A (IF 2.6) Pub Date : 2024-04-09 Yu Huang, Ming Yang, Zhi Lin, Xi-Kun Li, Arif Ullah, Zhuo-Liang Cao
Large-scale entangled states are important physical resources, which can be generated from small-scale ones via quantum state fusion. Measurement in fusion operation will cause particle and efficiency loss, so a fusion scheme without qubit loss is expected to be the most efficient one, but counter-intuitively it is not the case. So in this paper we reveal the essence of the fusion mechanism, and answer
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Weak coupling strength measurement between two whispering-gallery-mode microresonators near an exceptional point Phys. Lett. A (IF 2.6) Pub Date : 2024-04-09 Qing Qin, Meng-Chong Shen, Rui Xu, Chong-Jin Yi, Yi-Fei Zhang, Xiu-Min Lin, Gong-Wei Lin, Ming-Yong Ye
Sensing is one of the important applications of the whispering-gallery-mode (WGM) microresonator. Here we consider a model consisting of two WGM microresonators and one fiber waveguide. We show that the system can be near an exceptional point when the two tapers in the fiber waveguide are coupled to the two microresonators in a way that can lead to an unidirectional coupling. We propose a method to
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Andreev reflections in deformed semi-Dirac material superconducting junctions Phys. Lett. A (IF 2.6) Pub Date : 2024-04-09 Xue-Sheng He, Hou-Jian Duan, Chang-Yong Zhu, Ming-Xun Deng, Rui-Qiang Wang
Besides the strong anisotropy, another unique feature of the semi-Dirac materials (SDMs) is the evolution of its dispersion with gap parameter from a merging semi-Dirac point to two Dirac points. In this study, we study the superconducting coherent transport at the SDM superconducting junction and focus on the influence of evolution of the SDM dispersion on the Andreev reflection. We found that the
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Ground-state phase diagram of two-component interacting bosons on a two-leg ladder Phys. Lett. A (IF 2.6) Pub Date : 2024-04-05 Po Chen, Chenrong Liu
Using the cluster Gutzwiller mean-field method, we numerically study the ground-state phase diagram of the non-hard-core two-component interacting bosons trapped in a two-leg ladder with and without an artificial magnetic field. There are three quantum phases namely Mott insulator (MI), supercounterfluid (SCF), and superfluid (SF) are found in the phase diagram. Interestingly, several loophole SCF
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Ubiquitous light real-space pairing from long-range hopping and interactions Phys. Lett. A (IF 2.6) Pub Date : 2024-04-05 G.D. Adebanjo, J.P. Hague, P.E. Kornilovitch
We systematically examine how long-range hopping and its synergy with extended interactions leads to light bound pairs. Pair properties are determined for a dilute extended Hubbard model with large on-site repulsion () and both near- and next-nearest neighbor hopping ( and ) and attraction ( and ), for cubic and tetragonal lattices. The presence of and promotes light pairs. For tetragonal lattices
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The Hopf equation with certain modular nonlinearities Phys. Lett. A (IF 2.6) Pub Date : 2024-04-04 Efim Pelinovsky, Tatiana Talipova, Ekaterina Didenkulova
The dynamics of waves of sign-variable shape has been studied within the framework of the Hopf equation () with a non-analytic propagation velocity containing the modulus of the function at the zero crossing (). It is shown that Riemann waves exist only for a certain smoothness of the function at the initial moment of time. Otherwise, the wave immediately overturns (gradient catastrophe). Popular in
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Complementary absorption effect to improve the optical efficiency of dual-absorption-layered PSCs Phys. Lett. A (IF 2.6) Pub Date : 2024-04-04 MingXin Lei, ChaoLing Du, XiaoYang Zhang, YiHan Ding, WeiWei Xie, XueJin Zhang, DaNing Shi
By taking advantage of the complementary absorption effect of germanium (Ge) and perovskite, a novel perovskite solar cell (PSC) was proposed by stacking Ge and perovskite thin films to serve as the dual absorption layer. Its absorption spectra and photocurrent were calculated and optimized as a function of the thickness of Ge film by finite element method (FEM). Then, the optical efficiency was further
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Pseudogap in Sr2−xLaxIrO4: Gor'kov-Teitel'baum thermal activation model Phys. Lett. A (IF 2.6) Pub Date : 2024-04-04 Jalaja Pandya, Devarshi Dave, Navinder Singh
Recently, Hall effect measurements are done on Lanthanum doped Strontium Iridate which is 5d analogue of cuprates . Hall effect measurements show that the effective carrier density exhibits a crossover from to near . This is very similar to that found in cuprates around . It is proposed that a pseudogap (PG) state in exists and is ending at . However, PG boundary (in doping-temperature phase diagram)
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Precipitation kinetics of Cu in FeCu and FeCuX (X=B, N, and BN) alloys using kinetic Monte Carlo simulations Phys. Lett. A (IF 2.6) Pub Date : 2024-04-03 An-Xiang Zheng, Yi-Lin Liu, Xian Tang, Long Yan, Guo-Dong Cheng
We employed kinetic Monte Carlo simulations to investigate the precipitation of Cu in FeCu and FeCu (=B, N, and BN) alloys. The parameters of kinetic Monte Carlo simulations were obtained through first-principles calculations. In this study, we utilized a vacancy-mediated model that considers the migration barriers dependent on local impurity atomic environments. The dynamical stability of both FeCu
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Facile synthesis of amorphous hollow cobalt-tin oxides for triethylamine detection Phys. Lett. A (IF 2.6) Pub Date : 2024-04-03 Ruihua Yuan, Yang Yu, Qin Zhang
Amorphous material based gas sensors have attracted extensive attention due to the unique disordered atomic state and enhanced performance. In this work, the gas-sensitive amorphous hollow CoSnO was synthesized by a calcining strategy. The gas response of amorphous hollow CoSnO is 246.5 toward 100 ppm triethylamine at 120 °C. The gas responses of amorphous, weakly crystalline and crystalline CoSnO
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Disorder effects on the topological superconductor with Hubbard interactions Phys. Lett. A (IF 2.6) Pub Date : 2024-04-02 Yiting Deng, Yan He
We study the two-dimensional disordered topological superconductor with Hubbard interactions. When the magnitude of the pairing potential is tuned to special values, this interacting model is exactly solvable even when disorders are imposed on the potential term or coupling constants. The topology of this model is investigated in detail by the real space Chern number formula, which computes the topological
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Modulating the electronic transport properties of zigzag phosphorene nanoribbons through the coupling with the chromium triiodide molecules Phys. Lett. A (IF 2.6) Pub Date : 2024-04-01 Aihemaitijiang Sidike, Xiaojiao Zhang, Yuechao Shi, Jintao Xu, Bei Zhang, Mengqiu Long
Based on density functional theory (DFT) and non-equilibrium Green's function (NEGF) method, we have investigated spin-dependent electronic transport properties of zigzag phosphorene nanoribbons (ZPNRs) coupled with chromium triiodide (CrI) molecules. Three different adsorption models have been considered: CrI molecule is placed on ZPNR surface (C-type), and CrI molecule is lateral adsorbed on the
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Study of iron ion distribution in rare earth (La, Pr, Sm, Dy) doped nickel-zinc spinel ferrites through Mössbauer spectroscopy Phys. Lett. A (IF 2.6) Pub Date : 2024-04-01 Changyang Wang, Bohan Zou, Yiren Wu, Zeyi Lu, Zheng Li, Dong Xie, Min Liu
NiZnFeREO (RE=La, Pr, Sm, Dy) spinel ferrites were prepared using the sol-gel method. X-ray diffraction analyses revealed that doping with rare earth ions increases the lattice parameters of the ferrites, accompanied by a decreasing trend due to lanthanide contraction. Mössbauer spectrum showed that rare earth ion doping facilitates the migration of iron ions from B sites to A sites, with the extent
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A DFT study of the proximity effect in the spin-orbit coupling in Au/graphene, Au/silicene, and Bi/silicene bilayers Phys. Lett. A (IF 2.6) Pub Date : 2024-03-31 I.N. Yakovkin, N.V. Petrova
The relativistic band structures of bilayers, built from graphene and silicene and monolayers of heavy atoms, Au and Bi, have been calculated within DFT. It is shown that when the orbital overlap is minor, like in the case of Au monolayer on graphene, a strong spin-orbit coupling in Au does not open a substantial gap in the Dirac cone. When, in contrast, the overlap of the wave functions is significant
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Robust optical bistability and multistability in topological coupled cavity-waveguide system Phys. Lett. A (IF 2.6) Pub Date : 2024-03-30 Kang-Hyok O, Kwang-Hyon Kim
Robust optical bistability and multistability in topological coupled cavity-waveguide systems with one- and two-color pumping are analytically and numerically demonstrated, taking chalcogenide valley-Hall photonic crystal structure supporting valley-dependent topological edge and corner states, as an example. Due to inherently narrow linewidth of corner states, the photonic system exhibits a sharp
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Tunable topological edge states and energy harvesting of piezoelectric-inductance phononic crystals based on Su-Schrieffer-Heeger model Phys. Lett. A (IF 2.6) Pub Date : 2024-03-30 Cong Liu, Yuping Tian, Yongqiang Zhang, Zhuhua Tan
Based on Su-Schrieffer-Heeger (SSH) model, a one-dimensional tunable topological phononic crystal (PnC) was designed. Piezoelectric column with an inductance was designed as a scatterer embedded in the epoxy resin matrix. And the introduce of an inductance into each piezoelectric column resulted in a new Dirac point in band structure. Subsequently, the new Dirac point was operated to open/close by
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Tailoring electronic and magnetic properties of two-dimensional Al2O3 monolayers through surface functionalization: A density functional theory exploration Phys. Lett. A (IF 2.6) Pub Date : 2024-03-29 Jaafar Jalilian, Ghasem Rezaei, Behrooz Vaseghi, Elham Zare, Faramarz Kanjouri, Fardin Taghizadeh
This study investigates the electronic and magnetic properties of the functionalized AlO monolayer using density functional theory. The electronic band structure analysis reveals that the pristine AlO monolayer is an insulator with a band gap of approximately 6 eV. Surface functionalization induces a significant impact on the electronic properties, leading to a transition from an insulator to a ferromagnet
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Giant enhancement of positive and negative Goos-Hänchen shifts in two-dimensional grating waveguide structures supporting Fano resonances Phys. Lett. A (IF 2.6) Pub Date : 2024-03-28 Bo Huang, Meiqi Li, Aiping Luo, Weiyi Hong
We propose a two-dimensional grating waveguide structure based on guided-mode resonance (GMR) to greatly enhance the Goos-Hänchen (GH) shift due to the asymmetric Fano peak. In addition, the enhancement of the GH shift is located at the peak of the reflectivity, which enables a more accessible measurement compared to the conventional GH shift enhancement based on Brewster angle or transmission-type
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Radius evolution for the synchronous collapse of a circular vapor bubble cluster Phys. Lett. A (IF 2.6) Pub Date : 2024-03-28 Yupeng Qin, Zhen Wang, Li Zou
The radius evolution for the synchronous collapse motion of a circular vapor bubble cluster in an ideal and infinite fluid is studied. With the assumption that all bubbles are evenly distributed around the circumference and have the same initial conditions, we establish the associated governing equation for this case from a modified Rayleigh–Plesset equation. The inverted analytical solution in the
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Extension of the method of images in electromagnetism at an interface between two lossless dielectric media Phys. Lett. A (IF 2.6) Pub Date : 2024-03-27 Walter Gustavo Fano
The method of images is well-known in electrostatics and electromagnetic radiation problems, like currents on a metallic ground plane to replace the original problem. This paper extends the method of images to the case of a dipole antenna on a dielectric ground plane, like concrete, considering that from 1 GHz to 40 GHz is a low-loss dielectric material. The contribution of this work is the model that
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Statistical properties and repetition rates for a quantum network with geographical distribution of nodes Phys. Lett. A (IF 2.6) Pub Date : 2024-03-27 Rute Oliveira, Raabe Oliveira, Nadja K. Bernardes, Rafael Chaves
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Optical switch based on tunable perfect photon absorption Phys. Lett. A (IF 2.6) Pub Date : 2024-03-26 Miao-Di Guo, Ya-Jie Wu, Ning Li, Hai-Feng Li, Chun-Xiao Zhou
We investigate the manipulation of optical field within quantum electrodynamics (QED) scheme. In our proposal, the cold three-level atoms interact with a two-sided cavity driven by two coherent beams with a relative phase. Coherent perfect absorption (CPA) appears when the beams are in phase. However, the perfect outputs occur when the beams are out of phase. On the basis of the phase modulation, an
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Spatiotemporal dynamics of modulation instability in Kerr nonlinear media with pure-quartic dispersion Phys. Lett. A (IF 2.6) Pub Date : 2024-03-24 Jinggui Zhang, Yunwu Xu
We present the analytical and numerical analysis on spatiotemporal dynamics of modulation instability (MI) in Kerr nonlinear media with pure-quartic dispersion. We apply a linear stability method to arrive at a universal expression for pure-quartic instability gain, which can simultaneously describe the temporal, spatial, and spatiotemporal cases. The results show that the condition of such three fundamental
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Quantum illumination with noisy probes: Conditional advantages of non-Gaussianity Phys. Lett. A (IF 2.6) Pub Date : 2024-03-24 Rivu Gupta, Saptarshi Roy, Tamoghna Das, Aditi Sen(De)
Entangled states, like the two-mode squeezed vacuum state, are known to give quantum advantage in the illumination protocol, a method to detect a weakly reflecting target submerged in a thermal background. We use non-Gaussian photon-added and -subtracted states, affected by local Gaussian noise on top of the omnipresent thermal noise, as probes in the illumination protocol. Based on the difference
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Phonon and electronic properties of semiconducting silicon nitride bilayers Phys. Lett. A (IF 2.6) Pub Date : 2024-03-23 Jiesen Li, Wanxing Lin, Junjun Shi, Feng Zhu, Haiwen Xie, Dao-Xin Yao
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Temporal cloaking via the effect of Compton scattering Phys. Lett. A (IF 2.6) Pub Date : 2024-03-21 Aleem Ullah, Rashid Ahmad, Kefayat Ullah, Yasir Ali, Arif Ullah
In this work we have studied Temporal Cloaking in a 4 level atomic system in the presence of Compton scattering effect. Between the scattered and un-scattered probe light beams multiple time gaps are noted. Furthermore, it is noted that Compton scattering angle has significant influence on the time gap produced in the system. The time gap increased rapidly by increasing the value of up to and then
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Loading atoms from a large magnetic trap to a small intra-cavity optical lattice Phys. Lett. A (IF 2.6) Pub Date : 2024-03-20 D. Varga, B. Gábor, B. Sárközi, K.V. Adwaith, D. Nagy, A. Dombi, T.W. Clark, F.I.B. Williams, P. Domokos, A. Vukics
We show that an optimized loading of a cold ensemble of rubidium-87 atoms from a magnetic trap into an optical lattice sustained by a single, far-red-detuned mode of a high-Q optical cavity can be efficient despite the large volume mismatch of the traps. The magnetically trapped atoms are magnetically transported to the vicinity of the cavity mode and released from the magnetic trap in a controlled
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First-principles analysis of physical properties of the novel calcium-based hydrides for hydrogen storage application Phys. Lett. A (IF 2.6) Pub Date : 2024-03-20 Wahidullah Khan, M. Kashif Masood, Khawla Chaoui, Ramesh Sharma, Naveed Ashraf, Rizwan Rafique, Ali Hammad, Asma A. Alothman, Javed Rehman
The current work aims to investigate the physical properties of the new calcium-based perovskite hydride CaXH (X=Cu, and Zn) for hydrogen storage applications using DFT studies. Both materials were found to be thermodynamically and mechanically stable owing to their negative formation enthalpies, cohesive energy, and elastic constants. The absence of negative frequencies in the phonon dispersion curve
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Abruptly autofocusing of polycyclic tornado symmetric Pearcey vortex beams in the fractional Schrödinger equation Phys. Lett. A (IF 2.6) Pub Date : 2024-03-18 Xiao Zhang, Peixin Yu, Shuo Yang, Shuyu Li, Zhongsheng Man, Xiaolu Ge, Shenggui Fu, Chidao Chen, Liping Zhang
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Corrigendum to “Structure of the nearly-degenerate manifold of lattice quasiholes on a torus” [Phys. Lett. A 445 (2022) 128259] Phys. Lett. A (IF 2.6) Pub Date : 2024-03-16 Z. Zeybek, R.O. Umucalılar
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Classes of Gaussian states for squeezing estimation Phys. Lett. A (IF 2.6) Pub Date : 2024-03-13 Leonardo A.M. Souza
This study explores a detailed examination of various classes of single- and two-mode Gaussian states as key elements for an estimation process, specifically targeting the evaluation of an unknown squeezing parameter encoded in one mode. To quantify the efficacy of each probe, we employ the concept of Average Quantum Fisher Information (AvQFI) as a robust metric to quantify the optimal performance
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Design of atomically localized magnetic moment by adatoms chemisorbed on graphene Phys. Lett. A (IF 2.6) Pub Date : 2024-03-11 Chong Li, Xuyan Sun, Pengfei Yuan, Fei Wang, Chunyao Niu, Bin Cui, Yu Jia
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Wait time to stochastic self-focusing Phys. Lett. A (IF 2.6) Pub Date : 2024-03-08 A.M. Zheltikov
The first passage time extended to stochastic nonlinear beam dynamics emerges as a natural time scale and a meaningful estimator for the expected wait time to the first self-focusing event within a large sample of stochastic laser pulses. We show that the ratio of the laser peak power to the critical power of self-focusing , which plays a central role in deterministic self-focusing, keeps its status
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Measurement-extracted total, classical and quantum correlations Phys. Lett. A (IF 2.6) Pub Date : 2024-03-08 Yuan Sun
Measurements are indispensable tools for extracting information about quantum systems. For a bipartite system, local measurements provide a way to probe its correlations. In this work, we study correlations of a bipartite state from the perspective of local measurements. We introduce measurement-extracted total correlations as the average reduction of quantum mutual information caused by this measurement
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A Bohmian trajectory analysis of singular wave functions Phys. Lett. A (IF 2.6) Pub Date : 2024-03-07 Ángel S. Sanz, Luis L. Sánchez-Soto, Andrea Aiello
The Schrödinger equation admits smooth and finite solutions that spontaneously evolve into a singularity, even for a free particle. This blowup is generally ascribed to the intrinsic dispersive character of the associated time evolution. We resort to the notion of quantum Bohmian trajectories to relate this singular behavior to local phase variations, which generate an underlying velocity field responsible
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Controlled linearly chirped similaritons in inhomogeneous birefringent optical fibers Phys. Lett. A (IF 2.6) Pub Date : 2024-03-07 Houria Triki, Baohua Wang, Qin Zhou
By similarity transformation, optical similaritons in a nonlinear birefringent optical fiber are investigated within the framework of two coupled nonlinear Schrödinger equations with space-modulated self- and cross-phase modulation nonlinearities, group velocity dispersion, external electro-optic phase modulation, and gain/loss. We find that the birefringent nonlinear medium with spatial parameter
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Highly spin-polarized current in an antiferromagnetic MnBi2Te4 film Phys. Lett. A (IF 2.6) Pub Date : 2024-03-06 Gen-Hua Liu, Jin-Xiang Yan
The spin polarization of current plays an important role in the performance of spintronic devices. Therefore, a highly spin-polarized current source has always been explored through various methods. We study the effects of magnetic order on the electronic structures of antiferromagnetic (AFM) MnBiTe films. A significant spin splitting is found in the surface states of a AFM MnBiTe film with three septuple
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Quantum α-fidelity of diagonalizable second-order Hamiltonians in multi-dimensional systems Phys. Lett. A (IF 2.6) Pub Date : 2024-03-06 Xiaojing Yan, Zhi Yin, Longsuo Li
How to characterize the similarity between two quantum states has received much attention recently. Motivated by the continued push in this direction, we propose a computable analytical formula for the quantum -fidelity between diagonalizable second-order Hamiltonians, which is simply expressed in terms of the matrix representation of operators. Further, using this analytical formula, we calculate
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High Curie temperature and high magnetization potential Fe2CoS alloy soft magnet Phys. Lett. A (IF 2.6) Pub Date : 2024-03-05 Haq Siraj Ul, Imran Khan, Jisang Hong
Developing soft magnets is attracting extensive research efforts for several device applications and other issues. Here, we investigate the finite temperature magnetic properties of the FeCoS alloy using first-principles density functional theory calculations and Monte Carlo simulations. Without a demagnetization factor, it exhibits semi-hard-magnetic properties at room temperature. For instance, it
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Discreteness effects on the fluxon interaction with the dipole impurity in the Josephson transmission line Phys. Lett. A (IF 2.6) Pub Date : 2024-03-04 Ivan O. Starodub, Yaroslav Zolotaryuk
The influence of discreteness on the fluxon scattering on the dipole-like impurity is studied. This kind of impurity is used to model the qubit inductively coupled to the Josephson transmission line (JTL). The previously proposed fluxon assisted readout process of the qubit state is based on measuring the passage time through the dipole impurity. The aim of this work is to clarify the role of the discreteness
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Single-photon sources based on incomplete binary-tree multiplexers with optimized inputs Phys. Lett. A (IF 2.6) Pub Date : 2024-03-04 Peter Adam, Matyas Mechler
We analyze single-photon sources based on minimum-based, maximum-logic output-extended incomplete binary-tree multiplexers assuming different input mean photon numbers in each of the multiplexed units. This approach results in maximal single-photon probabilities higher than those achieved with optimal identical input mean photon numbers. The proposed technique decreases the multiphoton noise of the
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Theoretical exploration of photoemission characteristics of GaAs nanowire array cathode based on photon-enhanced thermionic emission Phys. Lett. A (IF 2.6) Pub Date : 2024-03-01 Yu Diao, Sihao Xia
The theoretical photoemission models of single GaAs nanowire and nanowire array cathode based on photon-enhanced thermionic emission (PETE) mechanism are respectively developed by utilizing two-dimensional continuity equations. Based on the built models in this work, the effect of several key factors on the quantum efficiency are also discussed. Results show that GaAs nanowire cathode exhibits the
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High-order exceptional points and novel light transmission spectra in [formula omitted] symmetric ring resonator array Phys. Lett. A (IF 2.6) Pub Date : 2024-03-01 Chuanxun Du, Yao-Tong Chen, Lei Du, Jin-Hui Wu
In this paper we construct symmetric 1D multi-mode ring resonator arrays to study the high-order exceptional points and related light transmission spectra. We first focus on arrays with the underling symmetry given by SU(2) group possessing high-order exceptional points (EPs). The Gilmore-Perelomov coherent state approach has been well tested in SU(2) symmetric waveguide array, but how this approach
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The cavitation dynamics of a strongly driven single spherical gas bubble in high viscosity liquids Phys. Lett. A (IF 2.6) Pub Date : 2024-02-29 Kaveh Pasandideh, Sayed Sajjad Mousavi Fard
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Andreev bound states in superconductor-barrier-superconductor junctions of Rarita-Schwinger-Weyl semimetals Phys. Lett. A (IF 2.6) Pub Date : 2024-02-29 Ipsita Mandal
We consider a superconductor-barrier-superconductor configuration built with Rarita-Schwinger-Weyl semimetal, which features four bands crossing at a single nodal point. Assuming a homogeneous s-wave pairing in each superconducting region, and the barrier region created by applying a voltage of magnitude across a piece of normal state semimetal, we apply the BdG formalism to compute the discrete energy
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Dirac particle under dynamical confinement: Fermi acceleration, trembling motion and quantum force Phys. Lett. A (IF 2.6) Pub Date : 2024-02-29 J. Dittrich, S. Rakhmanov, D. Matrasulov
Quantum dynamics of a Dirac particle in a 1D box with moving wall is studied. Dirac equation with time-dependent boundary condition is mapped onto that with static one, but with time-dependent mass. Exact analytical solution of such modified Dirac equation is obtained for massless particle. For massive particle the problem is solved numerically. Time-dependences of the main characteristics of the dynamical
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Many-body t-matrix theory eliminated the infrared divergence on the Bose-Einstein-condensed systems Phys. Lett. A (IF 2.6) Pub Date : 2024-02-29 Won-Sus Ri, Ha Kim, Gwang-Jin Kim, Su-Bok Ri, Jong-Yon Kim
We have proved in the many-body t-matrix approximation for the weakly interacting Bose gas the infrared divergences are exactly removed. We also show that this t-matrix becomes very temperature-dependent and, as the temperature approaches to it vanishes at the transition point. This leads to a smooth change of condensate density and compressibility at , implying the second order phase transition occurs
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Exact numerical analysis of EMEC mode instability in more realistic Cairns distributed non-thermal plasmas Phys. Lett. A (IF 2.6) Pub Date : 2024-02-28 Muhammad Ahsan Shahzad, Aman-ur-Rehman, Mushtaq Ahmad, Muhammad Sarfraz, Muhammad Bilal, Shahzad Mahmood
Non-thermal plasma systems beyond the state of thermal equilibrium must have non-thermality dependent effective temperatures. These particle populations cannot have Maxwellian temperatures which are typically considered at thermal equilibrium in the context of Maxwellian plasmas. Previously, in such dilute environments, numerous non-thermal distributions incorporating the concept of Maxwellian temperature
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Polarization-sensitive asynchronous switch and notable slow-light based on tunable triple plasmon-induced transparency effect Phys. Lett. A (IF 2.6) Pub Date : 2024-02-27 Haiye Xu, Hui Xu, Xiaojie Yang, Ming Li, Hongfei Yu, Yuxuan Cheng, Shiping Zhan, Zhiquan Chen
We have achieved a tunable triple plasmon-induced transparency (PIT) effect on a metasurface aligned with continuous graphene strips. We also introduce coupled mode theory (CMT) as an explanation of the triple-PIT, obtaining theoretical calculation data consistent with time-domain finite-difference method (FDTD) simulations. A five-frequency asynchronous switch is developed by exploiting the sensitivity
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Nonlinear phase estimation based on nonlinear interferometers with coherent and squeezed vacuum light Phys. Lett. A (IF 2.6) Pub Date : 2024-02-27 Jian-Dong Zhang, Shuai Wang
Nonlinear interferometers, also known as SU(1,1) interferometers, are unconventional interferometers deploying nonlinear elements. Previous studies showed that they can provide better sensitivity than conventional Mach-Zehnder interferometers regarding the linear phase estimation. In this paper, we make use of nonlinear interferometers with coherent and squeezed vacuum states to perform nonlinear phase
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Anisotropic thermal expansion and themomechanic properties of α-phase group-VA monolayers Phys. Lett. A (IF 2.6) Pub Date : 2024-02-25 Gang Liu, Fengli Cao, Aiqing Guo, Xiaodong Qiu, Hui Wang
The theoretical investigations of anisotropic thermal expansion are quite few as the huge computational cost. In this work, a scheme of Taylor expansion for phonon free energy is introduced to investigate anisotropic thermal expansion, which can save lots of computational cost. The anisotropic thermal expansion and thermomechanic properties of α-phase group-VA monolayers (α-P, α-As, α-Sb and α-Bi)
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On the direct quantization of Proca gauge invariant field Phys. Lett. A (IF 2.6) Pub Date : 2024-02-23 W. Benarab, Z. Belhadi
In this study, we use the generalized integration constants method “GCI” to quantize two fields with constraints. Indeed, Proca field, that describes a massive boson is studied first, based on a Lagrangian without gauge symmetry, in order to determine the necessary brackets for its canonical quantization. Then, another gauge invariant version of this field, obtained by adding an additional scalar field
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Four-state continuous variable quantum key distribution with two accelerating partners Phys. Lett. A (IF 2.6) Pub Date : 2024-02-23 Jiayan Fu, Bangjie Su, Jian Zhou, Ronghua Shi, Jinjing Shi
The field of quantum communication has gradually expanded to include satellites in Earth's orbit. However, for long-distance communication protocols, gravity and its effect on quantum states must be taken into account. By applying the equivalence principle, we can consider that the gravitational effects are equivalent to the acceleration that observers possess. A comprehensive method is proposed to
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Nonequilibrium quantum dynamics and chiral Bloch oscillation in an interacting two-leg ladder induced by defect perturbations Phys. Lett. A (IF 2.6) Pub Date : 2024-02-23 Yue Jian, Ai-Xia Zhang, Zi-Fa Yu, Ju-Kui Xue
The nonequilibrium quantum dynamics and nonlinear chiral Bloch oscillation in interacting flux ladder induced by arbitrarily distributed defects are studied analytically and numerically. Under a time-dependent two-mode approximation, the system with arbitrarily distributed defects can be deduced to the case with single defect and the dynamical behavior of the system can be predicted analytically. The