Quantum nonlocality without counterfactual definiteness?

Muynck, Willem M. de; Baere, W. De

doi:10.1007/bf00769704

Cited by 13 publications

(11 citation statements)

References 6 publications

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“…Stapp's argument is simple and direct, albeit he received many criticisms [9,[54][55][56]. In most cases, he responded to those criticisms by trying to explain misinterpretations and unnecessary complications introduced by such misunderstandings [57][58][59][60].…”

Section: Counterfactual Derivation Without Hidden Variablesmentioning

confidence: 99%

On the Consistent Meaning of Local Realism

Lambare¹

2022

Preprint

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We present a pragmatic analysis of the different meanings assigned to the term ``local realism'' in the context of the empirical violations of Bell-type inequalities since its inception in the late 1970s. We point out that most of them are inconsistent and arise from a deeply ingrained prejudice that originated in the celebrated 1935 paper by Einstein-Podolski-Rosen. We highlight the correct connotation that arises once we discard unnecessary metaphysics.

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Section: Counterfactual Derivation Without Hidden Variablesmentioning

confidence: 99%

On the Consistent Meaning of Local Realism

Lambare¹

2022

Preprint

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“…But, "it ain't necessarily so" [19]. It is the implication (5), which correctly describes the situation, see below.…”

Section: Derived Realism?mentioning

confidence: 99%

Quantum non-locality - It ain't necessarily so...

Zukowski,

Brukner

2015

Preprint

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Bell's theorem is 50 years old. Still there is a controversy about its implications. Much of it has its roots in confusion regarding the premises from which the theorem can be derived. Some claim that a derivation of Bell's inequalities requires just locality assumption, and nothing more. Violations of the inequalities are then interpreted as "nonlocality" or "quantum nonlocality". We show that such claims are unfounded and that every derivation of Bell's inequalities requires a premise -in addition to locality and freedom of choice -which is either assumed tacitly, or unconsciously, or is embedded in a single compound condition (like Bell's "local causality"). The premise is equivalent to the assumption of existence of additional variables which do not appear in the quantum formalism (in form of determinism, or joint probability for outcomes of all conceivable measurements, or "additional causes'", or "hidden variables", "complete description of the state" or counterfactual definiteness, etc.). A certain irony is that perhaps the main message of violation of Bell's inequalities is that our notion of locality should be based on an operationally well-defined no-signalling condition, rather than on local causality.

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“…Bell's theorem), we continue our past approach (3,4,(15)(16)(17) and argue that the origin of the conflict between QM and classicalmechanics (CM)-like schemes is the assumed general validity of the idea of CFD, applied to the domain of individual quantum processes. At first sight this conclusion coincides with the critical remarks by Mermin and Unruh (who warn to be careful with the use of CFD), and with those by Shimony and Stein (in terms of "possible worlds").…”

Section: Introductionmentioning

confidence: 97%

“…[14] As on past occasions (see Refs. 15,16,17) Stapp * Electronic address: willy.debaere@UGent.be could not be convinced, as these criticisms were followed by several replies. [18,19] In the Abstract of Ref.…”

Section: Introductionmentioning

confidence: 99%

On the Consequences of Retaining the General Validity of Locality in Physical Theory

Baere

2005

Found Phys

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The empirical validity of the locality (LOC) principle of relativity is used to argue in favour of a local hidden variable theory (HVT) for individual quantum processes. It is shown that such a HVT may reproduce the statistical predictions of quantum mechanics (QM), provided the reproducibility of initial hidden variable states is limited. This means that in a HVT limits should be set to the validity of the notion of counterfactual definiteness (CFD). This is supported by the empirical evidence that past, present, and future are basically distinct.Our argumentation is contrasted with a recent one by Stapp resulting in the opposite conclusion, i.e. nonlocality or the existence of faster-than-light influences. We argue that Stapp's argumentation still depends in an implicit, but crucial, way on both the notions of hidden variables and of CFD. In addition, some implications of our results for the debate between Bohr and Einstein, Podolsky and Rosen are discussed.

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Quantum nonlocality without counterfactual definiteness?

Cited by 13 publications

References 6 publications

On the Consistent Meaning of Local Realism

On the Consistent Meaning of Local Realism

Quantum non-locality - It ain't necessarily so...

On the Consequences of Retaining the General Validity of Locality in Physical Theory

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