Entanglement, intractability and no-signaling

Srikanth, R.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3973

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DC Field	Value	Language
dc.contributor.author	Srikanth, R.	-
dc.date.accessioned	2011-04-08T05:27:50Z	-
dc.date.available	2011-04-08T05:27:50Z	-
dc.date.issued	2010-06	-
dc.identifier.citation	Physica Scripta, 2010, Vol.81, 065002	en
dc.identifier.issn	1402-4896 (Online)	-
dc.identifier.issn	0031-8949	-
dc.identifier.uri	http://hdl.handle.net/2289/3973	-
dc.description	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)	en
dc.description.abstract	We consider the problem of deriving the no-signaling condition from the assumption that, as seen from a complexity theoretic perspective, the universe is not an exponential place. A fact that disallows such a derivation is the existence of polynomial superluminal gates, hypothetical primitive operations that enable superluminal signaling but not the efficient solution of intractable problems. It therefore follows, if this assumption is a basic principle of physics, either that it must be supplemented with additional assumptions to prohibit such gates or, improbably, that no-signaling is not a universal condition. Yet a gate of this kind is possibly implicit, although not recognized as such, in a decade-old quantum optical experiment involving position–momentum entangled photons. Here, we describe a feasible modified version of the experiment that appears to explicitly demonstrate the action of this gate. Some obvious counter-claims are shown to be invalid. We believe that the unexpected possibility of polynomial superluminal operations arises because some practically measured quantum optical quantities are not describable as standard quantum mechanical observables.	en
dc.language.iso	en	en
dc.publisher	IOP Publishing for the Royal Swedish Academy	en
dc.relation.uri	http://arxiv.org/abs/1005.3449	en
dc.relation.uri	http://dx.doi.org/10.1088/0031-8949/81/06/065002	en
dc.rights	2010 The Royal Swedish Academy of Sciences	en
dc.title	Entanglement, intractability and no-signaling	en
dc.type	Article	en
Appears in Collections:	Research Papers (LAMP)

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