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arXiv · 2512.15199

Sharing quantum indistinguishability with multiple parties

Lemieux Wang·Hanwool Lee·Joonwoo Bae·Kieran Flatt
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Abstract

Quantum indistinguishability of non-orthogonal quantum states is a valuable resource in quantum information applications such as cryptography and randomness generation. In this article, we present a sequential state-discrimination scheme that enables multiple parties to share quantum uncertainty, in terms of the max relative entropy, generated by a single party. Our scheme is based upon maximum-confidence measurements and takes advantages of weak measurements to allow a number of parties to perform state discrimination on a single quantum system. We review known sequential state discrimination and show how our scheme would work through a number of examples where ensembles may or may not contain symmetries. Our results will have a role to play in understanding the ultimate limits of sequential information extraction and guide the development of quantum resource sharing in sequential settings.

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Lemieux Wang, Hanwool Lee, Joonwoo Bae, Kieran Flatt. 2025-12-17. Sharing quantum indistinguishability with multiple parties. https://doi.org/10.1142/s1230161226500046

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