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Universal recoverability of quantum states in tracial von-Neumann algebras
Saptak Bhattacharya·December 9, 2025
Quantum Physicsmath.OA
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Abstract
In this paper, we discuss a refinement of quantum data processing inequality for the sandwiched quasi-relative entropy $\mathcal{S}_2$ on a tracial von-Neumann algebra. The main result is a universal recoverability bound with the Petz recovery map, which was previously obtained in the finite dimensional setup.