Local PT-symmetric evolutions on separable states and violation of no-signaling

2022/02/06 by Asmita Kumari, Ujjwal Sen, Kumari, Asmita +1
Physics and Astronomy · #FOS: Physical sciences #Quantum Mechanics and Non-Hermitian Physics #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.2202.02744

openalex publication_date 2022/02/06 · openalex created_date 2022/02/25 · openalex updated_date 2026/07/28

Abstract

We show that local PT-symmetric evolutions can lead to violation of the no-signaling principle for separable and even classically correlated bipartite shared quantum states. For classically correlated states, specially chosen PT-symmetric operations from a set of zero volume can also preserve the principle. The violations can be removed by using a CPT inner product instead of the traditional one.

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