Transmitting quantum information by superposing causal order of mutually unbiased measurements

Manish K. Gupta; Ujjwal Sen

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arXiv · 1909.13125

Transmitting quantum information by superposing causal order of mutually unbiased measurements

Manish K. Gupta·Ujjwal Sen

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Abstract

Two quantum measurements sequentially acting one after the other, if they are mutually unbiased, will lead to a complete removal of information encoded in the input quantum state. We find that if the order of the two sequential measurements can be superposed, with a quantum switch, then the information encoded in the input can still be retained in the output state.

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quant-ph cs.IT gr-qc math.IT

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Manish K. Gupta, Ujjwal Sen. 2019-09-28. Transmitting quantum information by superposing causal order of mutually unbiased measurements. https://arxiv.org/abs/1909.13125

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