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arXiv · 2312.13586

Nonclassical resource for continuous variable telecloning with non-Gaussian advantage

Sudipta Das·Rivu Gupta·Himadri Shekhar Dhar·Aditi Sen De
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Abstract

The telecloning protocol distributes quantum states from a single sender to multiple receivers via a shared entangled state by exploiting the notions of teleportation and approximate cloning. We investigate the optimal telecloning fidelities obtained using both Gaussian and non-Gaussian shared resources. When the shared non-Gaussian state is created by subtracting photons from both the modes of the Gaussian two-mode squeezed vacuum state, we demonstrate that higher telecloning fidelities can be achieved in comparison with its Gaussian counterpart. To quantify this advantage, we introduce a quadrature-based nonclassicality measure, which is capable of estimating the fidelity of the clones, both with Gaussian and non-Gaussian resource states. We further provide a linear optical setup for asymmetric telecloning of continuous variable states using a multimode entangled state.

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Sudipta Das, Rivu Gupta, Himadri Shekhar Dhar, Aditi Sen De. 2023-12-21. Nonclassical resource for continuous variable telecloning with non-Gaussian advantage. https://doi.org/10.1103/physreva.110.012410

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