Tripartite non-classical correlations without backwards in time signalling
arXiv:1809.06620 · doi:10.1103/PhysRevA.99.022101
Abstract
We investigate the relationship between no backwards in time signaling and classically causal correlations. We discover that unlike the case for two parties, the no backwards in time signaling paradigm for three parties is not enough to ensure that correlations can be reproduced with a classical causal ordering. We demonstrate this with an explicit example. We also generalise some existing results for linear two-time states to multi-party scenarios.
arXiv comment9 pages, 2 figures
References in corpus (17)
- Quantum correlations with no causal order
- Quantum computations without definite causal structure
- Towards a Formulation of Quantum Theory as a Causally Neutral Theory of Bayesian Inference
- Enhanced communication with the assistance of indefinite causal order
- Towards Quantum Gravity: A Framework for Probabilistic Theories with Non-Fixed Causal Structure
- Quantum common causes and quantum causal models
- Witnessing causal nonseparability
- Causal and causally separable processes
- The simplest causal inequalities and their violation
- Multiple-time states and multiple-time measurements in quantum mechanics
- Maximal incompatibility of locally classical behavior and global causal order in multi-party scenarios
- Multipartite Causal Correlations: Polytopes and Inequalities
- Quantum gravity computers: On the theory of computation with indefinite causal structure
- Quantum computation with indefinite causal structures
- Pre- and post-selected quantum states: density matrices, tomography, and Kraus operators
- Connecting processes with indefinite causal order and multi-time quantum states
- Device-independent test of causal order and relations to fixed-points