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

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arxiv 2202.02744 v1 pith:QKYFECB7 submitted 2022-02-06 quant-ph

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

classification quant-ph
keywords pt-symmetricstatesclassicallycorrelatedevolutionslocalno-signalingprinciple
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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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