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Article overview
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Bell Nonlocality and the Reality of Quantum Wavefunction | Anandamay Das Bhowmik
; Preeti Parashar
; Manik Banik
; | Date: |
18 May 2020 | Abstract: | The seminal Pusey-Barrett-Rudolph theorem establishes quantum wavefunction as
a state of reality rather than the mere information about the system. The
theorem, however, draws criticism due to a less justifiable assumption, namely
’preparation independence’, used in its derivation. In this work we propose a
new $psi$-ontology theorem by invoking a completely different assumption which
we call ’no ontic retro-causality’. We provide a rationale for this new
assumption and discuss novelty of the present $psi$-ontology theorem over the
existing ones. At the core of our derivation we utilize another influential
no-go result by John S. Bell that rules out any {it local realistic} world
view for quantum theory. More particularly, we show that Bell nonlocality
excludes a class of ontological explanations for quantum theory where quantum
wavefunction is treated as mere information, viz. $psi$-epistemic
explanations. Furthermore, the degree of quantum nonlocality puts nontrivial
limit on the degree of epistemicity. | Source: | arXiv, 2005.8577 | Services: | Forum | Review | PDF | Favorites |
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