Quantum data hiding with two-qubit separable states

• URL: http://arxiv.org/abs/2512.15095v1
• Date: Wed, 17 Dec 2025 05:28:45 GMT
• Title: Quantum data hiding with two-qubit separable states
• Authors: Donghoon Ha, Jeong San Kim,
• Abstract summary: We consider the discrimination of two-party quantum states and provide a quantum data-hiding scheme using two-qubit separable states.<n>As our data-hiding scheme can be implemented with separable states of the lowest possible dimension, its practical realization becomes significantly more attainable.
• Score: 0.48342038441006796
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We consider the discrimination of two-party quantum states and provide a quantum data-hiding scheme using two-qubit separable states. We first provide a bound on the optimal local discrimination of two-party quantum states, and establish a sufficient condition under which a two-party quantum state ensemble can be used to construct a data-hiding scheme. We illustrate this condition with examples of two-qubit state ensembles consisting of two orthogonal separable states. As our data-hiding scheme can be implemented with separable states of the lowest possible dimension, its practical realization becomes significantly more attainable.

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