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Local Orthogonality provides better upper bound for Hardy's nonlocality | | Subhadipa Das
; Manik Banik
; Md. Rajjak Gazi
; Ashutosh Rai
; Samir Kunkri
; | | Date: |
15 Nov 2013 | | Abstract: | The amount of nonlocality in quantum theory is limited compared to that
allowed in generalized no-signaling theory [Found. Phys. 24, 379 (1994)]. This
feature, for example, gets manifested in the amount of Bell inequality
violation as well as in the degree of success probability of Hardy’s
(Cabello’s) nonlocality argument. Physical principles like information
causality and macroscopic locality have been proposed for analyzing restricted
nonlocality in quantum mechanics---viz. explaining the Cirel’son bound.
However, these principles are not that much successful in explaining the
maximum success probability of Hardy’s as well as Cabello’s argument in quantum
theory. Here we show that, a newly proposed physical principle namely Local
Orthogonality does better by providing a tighter upper bound on the success
probability for Hardy’s nonlocality. This bound is relatively closer to the
corresponding quantum value compared to the bounds achieved from other
principles. | | Source: | arXiv, 1311.3710 | | Services: | Forum | Review | PDF | Favorites | |
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