Discriminating between Lüders and von Neumann measuring devices: An NMR investigation

Shukla, Abhishek; MAHESH, T. S.; Kumar, C. S. Sudheer

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dc.contributor.author	Kumar, C. S. Sudheer	en_US
dc.contributor.author	Shukla, Abhishek	en_US
dc.contributor.author	MAHESH, T. S.	en_US
dc.date.accessioned	2019-04-26T09:15:22Z
dc.date.available	2019-04-26T09:15:22Z
dc.date.issued	2016-10	en_US
dc.identifier.citation	Physics Letters A, 380(43), 3612-3616.	en_US
dc.identifier.issn	0375-9601	en_US
dc.identifier.uri	http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/2529
dc.identifier.uri	https://doi.org/10.1016/j.physleta.2016.09.004	en_US
dc.description.abstract	Quantum state after measuring a degenerate observable is given by Lüders and von Neumann state update rules. While the former preserves superpositions, the latter does not. Even though both rules are valid and realizable, which rule a given measuring device (“Black Box”) obeys, depends on its internal details. Recently Hegerfeldt and Mayato (2012) [5] had formulated a protocol to discriminate between the two kinds of measuring devices. Here we have reformulated this protocol for system and measuring qubits. We then experimentally investigated this protocol on an NMR spectrometer, and found that Lüders rule is favoured.	en_US
dc.language.iso	en	en_US
dc.publisher	Elsevier B.V.	en_US
dc.subject	Luders and von Neumann	en_US
dc.subject	NMR investigation	en_US
dc.subject	Four-qubit NMR system	en_US
dc.subject	Neumann measuring device	en_US
dc.subject	2016	en_US
dc.title	Discriminating between Lüders and von Neumann measuring devices: An NMR investigation	en_US
dc.type	Article	en_US
dc.contributor.department	Dept. of Physics	en_US
dc.identifier.sourcetitle	Physics Letters A	en_US
dc.publication.originofpublisher	Foreign	en_US