A computational model for quantum measurement

Srikanth, R.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3063

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DC Field	Value	Language
dc.contributor.author	Srikanth, R.	-
dc.date.accessioned	2007-06-21T08:56:56Z	-
dc.date.available	2007-06-21T08:56:56Z	-
dc.date.issued	2003-06	-
dc.identifier.citation	Quantum Information Processing, 2003, Vol.2, p153-199	en
dc.identifier.issn	1570-0755	-
dc.identifier.issn	1573-1332 (Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/3063	-
dc.description	Restricted Access.	en
dc.description.abstract	Is the dynamical evolution of physical systems objectively a manifestation of information processing by the universe? We find that an affirmative answer has important consequences for the measurement problem. In particular, we calculate the amount of quantum information processing involved in the evolution of physical systems, assuming a finite degree of fine-graining of Hilbert space. This assumption is shown to imply that there is a finite capacity to sustain the immense entanglement that measurement entails. When this capacity is overwhelmed, the system's unitary evolution becomes computationally unstable and the system suffers an information transition (ldquocollapserdquo). Classical behavior arises from the rapid cycles of unitary evolution and information transition. Thus, the fine-graining of Hilbert space determines the location of the ldquoHeisenberg cutrdquo, the mesoscopic threshold separating the microscopic, quantum system from the macroscopic, classical environment. The model can be viewed as a probablistic complement to decoherence, that completes the measurement process by turning decohered improper mixtures of states into proper mixtures. It is shown to provide a natural resolution to the measurement problem and the basis problem.	en
dc.format.extent	309528 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	Springer Verlag	en
dc.relation.uri	http://dx.doi.org/10.1023/B:QINP.0000004123.82268.f4	en
dc.rights	2003 Springer-Verlag	en
dc.subject	Quantum measurement theory	en
dc.subject	quantum information processing	en
dc.subject	entanglement production	en
dc.title	A computational model for quantum measurement	en
dc.type	Article	en
Appears in Collections:	Research Papers (LAMP)

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