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Exploring the limits of no backward in time signalling

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arxiv 1708.00669 v6 pith:NVPAAGNM submitted 2017-08-02 quant-ph

Exploring the limits of no backward in time signalling

Yelena Guryanova , Ralph Silva , Anthony J. Short , Paul Skrzypczyk , Nicolas Brunner , Sandu Popescu This is my paper
classification quant-ph
keywords signalingconditionsno-backwards-in-timeno-signalingspatialtimeaffectsallow
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present an operational and model-independent framework to investigate the concept of no-backwards-in-time signaling. We define no-backwards-in-time signaling conditions, closely related to the spatial no-signaling conditions. These allow for theoretical possibilities in which the future affects the past, nevertheless without signaling backwards in time. This is analogous to non-local but no-signaling spatial correlations. Furthermore, our results shed new light on situations with indefinite causal structure and their connection to quantum theory.

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