Entanglement is Necessary for Emergent Classicality in All Physical Theories

Richens, Jonathan G.; Selby, John H.; Al-Safi, Sabri W.

doi:10.1103/physrevlett.119.080503

Cited by 47 publications

(54 citation statements)

References 32 publications

(44 reference statements)

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“…This is somewhat intriguing since the purely quantum property of entanglement appears to be necessary for the emergence of the classical property of objectivity (for a similar conclusion but obtained in a very different context see Ref. [32]). But QEE alone is not sufficient for the emergence of objectivity even for qubit systems, since the condition for QEE generation,ρ k ii (t) =ρ k jj (t), is much weaker than the condition (12).…”

Section: Entanglement and The Emergence Of Objectivitymentioning

confidence: 67%

Entanglement and objectivity in pure dephasing models

Roszak

Korbicz

2019

Phys. Rev. A

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We study the relation between the emergence of objectivity and qubit-environment entanglement generation. We find that although entanglement with the unobserved environments is irrelevant (since sufficiently strong decoherence can occur regardless), entanglement with the observed environments is crucial. In fact, the appearance of an objective qubit-observed-environment state is strictly impossible if their joint evolution does not lead to entanglement. Furthermore, if a single observer has access to a single environment (no macrofractions) then the required orthogonality of the observed environmental states comes only as a consequence of the system-enviornment state becoming strongly entangled (maximally entangled for the given initial occupation of the qubit if the environmental state is initially pure).

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Section: Entanglement and The Emergence Of Objectivitymentioning

confidence: 67%

Entanglement and objectivity in pure dephasing models

Roszak

Korbicz

2019

Phys. Rev. A

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“…One could then examine the relation between simplicial theories with entanglement and theories having an epistemic restriction-such as Spekkens' toy theory [18]-or consider them in the light of Refs. [19,20] about emergent classicality. An explicit construction of a simplicial theory with entanglement, complete with the set of transformations, would allow one to study the simplicial scenario as far as information causality [21] or communication complexity are concerned.…”

Section: Discussionmentioning

confidence: 99%

Classical theories with entanglement

2020

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We consider theories where the set of states for every system is a simplex. A special case of such theories is that of classical theories, i.e. those whose pure states are jointly perfectly discriminable. The standard classical theory is the one satisfying local discriminability. However, simplicial theories-including the classical ones-can violate local discriminability, thus admitting entangled states. After proving that simplicial theories are necessarily causal, we provide necessary and sufficient conditions for them to exhibit entanglement, and classify their system-composition rules.

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“…Bion's hypothesis of the existence of a group psychical apparatus, which stands as the cornerstone of group analysis, postulates that, when the "working group" recedes and the behavior of the group is governed solely by its psyche, the individual members cease to be separated and the group behaves, and can be studied only, as a single system, as long as it remains unperturbed. Formally, this is exactly what happens in the quantum world when a number of microscopic entities interact and form an entangled quantum state (Einstein et al, 1935;Bohr, 1935;Schrödinger and Born, 1935;Schrödinger and Dirac, 1936;Bell, 1964;Bell, 1966;Aspect et al, 1982;Richens et al, 2017). In such a state, it becomes impossible to describe the behavior of the single elements, which are bound by a relation that transcends space and time and it becomes very similar to a causa formalis in the Aristotelic terminology (Hankinson, 1998).…”

Section: Introductionmentioning

confidence: 99%

An Update and Generalization of Group Unconscious Orientation in OMIE1 Group Training for Therapists

Zapirain¹,

Carminati

Rivas

et al. 2019

Neuroquantology

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Introduction: this paper presents an update of a previous study we conducted to explore the presence and behavior of a common orientation among the participants to a group training for therapists via their answers to an "absurd questionnaire". Having measured a second class of trainees during their training, we are able to compare the results with those obtained by the first measurement.Methods: as in the previous study, during the training we have submitted to the trainees 11 questionnaires composed of 50 pairs of images asking them to choose one image from each pair. We have then analyzed their initial picture choices and how they evolved over time. We also present the analysis of the combined data of both experiments. Results:In both experiments we found statistical evidence that both the initial choices of the pictures and their evolution during the training are not simply governed by randomness. The initial picture choice in each pair is highly skewed toward one of the two pictures, and there is a statistically significant change in the picture choice in the first part of the training in both experiments. Conclusions:The results could be interpreted as a manifestation of group dynamics postulated by Bion with his "basic assumptions". We see patterns that suggest an initial "honey moon" (dependence from the leader) followed by a "fight-flight" attitude (frustrated dependence from the leader) and finally a "mourning" of the group and of the training experience. In spite of some statistically significant differences between the two experiment, the behavior is largely compatible. Bion himself used to say that "as you never bath yourself twice in the same river, you never enter twice the same group", being every human assembly unique and singular.

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Entanglement is Necessary for Emergent Classicality in All Physical Theories

Cited by 47 publications

References 32 publications

Entanglement and objectivity in pure dephasing models

Entanglement and objectivity in pure dephasing models

Classical theories with entanglement

An Update and Generalization of Group Unconscious Orientation in OMIE1 Group Training for Therapists

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