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Quantum Optical Tristate Hadamard Gate Using Phase Encoding Principle on Photonic Crystal

  • General and Applied Physics
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Abstract

Researchers have reported two-state quantum Hadamard gate using different optical techniques. In this paper, authors propose a new concept for developing the tristate form of single qubit quantum Hadamard gate using phase encoding technique of light. Phase differences are generated by using electro-optic modulators of appropriate biasing voltages. The circuits are reversible and satisfy the quantum requirements. A similar system is also designed on 2D photonic bandgap crystal-based layout with footprint area 337.5 µm2. The cylindrical rods of refractive index 3.45 are inserted on air substrate to design the layout. The operation of the system is simulated by finite difference time domain (FDTD) method. Desired phase values are obtained by varying the optical path length in the channels. The maximum response time of the system is observed to be 0.125 ps which is very useful in superfast quantum computing and data processing.

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Acknowledgements

Snigdha Hazra acknowledges the financial support in the form of Inspire fellowship by DST, Govt. of India. Mir Nadim Sarfaraj thanks the financial support from JRF fellowship scheme of UGC, Govt. of India. Authors also thank UGC, govt. of India for CAS program for the department of Physics.

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  1. Department of Physics, The University of Burdwan, Burdwan, 713104, West Bengal, India

    Snigdha Hazra, Mir Nadim Sarfaraj & Sourangshu Mukhopadhyay

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  1. Snigdha Hazra
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  2. Mir Nadim Sarfaraj
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  3. Sourangshu Mukhopadhyay
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Correspondence to Mir Nadim Sarfaraj.

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Hazra, S., Sarfaraj, M.N. & Mukhopadhyay, S. Quantum Optical Tristate Hadamard Gate Using Phase Encoding Principle on Photonic Crystal. Braz J Phys 54, 64 (2024). https://doi.org/10.1007/s13538-024-01445-7

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