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Implications of Local Friendliness Violation for Quantum Causality [PDF]
Entropy, 2021 We provide a new formulation of the Local Friendliness no-go theorem of Bong et al. [Nat. Phys. 16, 1199 (2020)] from fundamental causal principles, providing another perspective on how it puts strictly stronger bounds on quantum reality than Bell’s ...
Eric G. Cavalcanti, Howard M. Wiseman
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Causality in a Qubit-Based Implementation of a Quantum Switch
Universe, 2022 We introduce a qubit-based version of the quantum switch, consisting of a variation of the Fermi problem. Two qubits start in a superposition state in which one qubit is excited and the other is in the ground state.
Carlos Sabín
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Quantum causality emerging in a delayed-choice quantum Cheshire Cat experiment with neutrons [PDF]
Scientific Reports, 2023 We report an experiment with neutrons in a silicon perfect crystal interferometer, that realizes a quantum Cheshire Cat in a delayed choice setting.
Richard Wagner +4 more
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Arrow of Causality and Quantum Gravity [PDF]
Physical Review Letters, 2019 5 pages, 2 ...
John F Donoghue, Gabriel Menezes
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Causality in Schwinger’s Picture of Quantum Mechanics [PDF]
Entropy, 2022 This paper begins the study of the relation between causality and quantum mechanics, taking advantage of the groupoidal description of quantum mechanical systems inspired by Schwinger’s picture of quantum mechanics. After identifying causal structures on
Florio M. Ciaglia +5 more
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Classical and Quantum Causal Interventions
Entropy, 2018 Characterising causal structure is an activity that is ubiquitous across the sciences. Causal models are representational devices that can be used as oracles for future interventions, to predict how values of some variables will change in response to ...
Gerard Milburn, Sally Shrapnel
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Rethinking Causality in Quantum Mechanics [PDF]
Springer Theses, 2019 Causality is central to understanding the mechanisms of nature: some event "A" is the cause of another event “B”. Surprisingly, causality does not follow this simple rule in quantum physics: due to to quantum superposition we might be led to believe that "A causes B” and that "B causes A”.
Christina Giarmatzi
exaly +4 more sources
Ontic and Epistemic States in the Theory of Spacetime-Local Beables [PDF]
EntropyBell’s theorem rules out developing a locally causal theory to describe quantum phenomena. Many take this to imply that any model of quantum entanglement must employ variables (called beables by Bell) which follow nonlocal rules, even though signaling is
Nathan Argaman
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Cyclic quantum causal models [PDF]
Nature Communications, 2021 AbstractCausal reasoning is essential to science, yet quantum theory challenges it. Quantum correlations violating Bell inequalities defy satisfactory causal explanations within the framework of classical causal models. What is more, a theory encompassing quantum systems and gravity is expected to allow causally nonseparable processes featuring ...
Jonathan Barrett +2 more
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npj Quantum Information, 2022 AbstractComplex processes often arise from sequences of simpler interactions involving a few particles at a time. These interactions, however, may not be directly accessible to experiments. Here we develop the first efficient method for unravelling the causal structure of the interactions in a multipartite quantum process, under the assumption that the
Ge Bai +4 more
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