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Towards generation of indistinguishable coherent states

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Abstract

We have addressed the characteristic distinguishability of coherent states in the temporal domain from a directly modulated quantum well-based gain-switched laser diode. We identify adjustable parameters to generate indistinguishable coherent states from an electrically pumped semiconductor laser using small-signal and large-signal models. The experiment confirms the generation of indistinguishable signal and decoy coherent states as predicted by the numerical simulation. In addition, the potential for indistinguishability has been explored in different types of coherent states.

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Acknowledgements

This study is funded by Robert Bosch LLC. The author would like to thank Thomas Strohm, Corporate Research Group, Robert Bosch GmbH for helpful discussions, and Thomas Hackenberg and team (XC/DBX), Robert Bosch GmbH for proof reading and improvement. The author also thank Reviewer 1 for constructive feedback and Reviewer 2 for suggesting Nonlinear Coherent States for the implementation of indistinguishable states.

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  1. Department of Advanced Network and Cross Domain Computing, Robert Bosch LLC, 15000 N Haggerty Road, Plymouth, MI, 48170, USA

    Pranshu Maan

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  1. Pranshu Maan
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Correspondence to Pranshu Maan.

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Maan, P. Towards generation of indistinguishable coherent states. Appl. Phys. B 128, 178 (2022). https://doi.org/10.1007/s00340-022-07892-x

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