Abstract

Current work performs a comprehensive exploration of the internal energy, entropy, heat capacity, and Helmholtz free energy of GaAs quantum dot (QD) under the joint influence of anharmonicity and Gaussian white noise (GWHN). The symmetry of the anharmonic potential (odd/even), the mode of application of GWHN (additive/multiplicative), and the QD confinement get involved in a highly intricate interplay to harness the said thermodynamic properties. Anharmonicity of odd (even) parity lowers (raises) the confinement of the system with respect to the anharmonicity-free state. Most often, multiplicative noise results into greater deviation of the thermodynamic properties (from the noise-free situation) than its additive neighbor. Added to this, applied additive (multiplicative) noise enhances (diminishes) the magnitudes of the thermal properties with respect to their noise-free values. The study also exhibits rivalry between thermal disorder and spatial disorder which marks its signature on the profiles of the said thermal properties.

Graphic abstract

Plot of entropy vs temperature for even anharmonicity in presence and absence of noise

中文翻译：

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在噪声-非谐相互作用影响下利用 GaAs 量子点的热力学特性

摘要

目前的工作对非谐性和高斯白噪声（GWHN）共同影响下的砷化镓量子点（QD）的内能、熵、热容和亥姆霍兹自由能进行了全面的探索。非谐势（奇/偶）的对称性、GWHN（加法/乘法）的应用模式以及 QD 限制参与高度复杂的相互作用，以利用所述热力学性质。奇（偶）奇偶校验的非和谐性降低（提高）了系统相对于非和谐性自由状态的限制。大多数情况下，乘性噪声会比其加性噪声导致热力学性质（与无噪声情况）的更大偏差。除此之外，应用的加性（乘性）噪声会增强（减少）热属性相对于无噪声值的幅度。该研究还展示了热无序和空间无序之间的竞争，这在所述热特性的轮廓上标记了其特征。

图文摘要

在存在和不存在噪声的情况下均匀非谐性的熵与温度图