Equivalence of classicality and separability based on P phase–space representation of symmetric multiqubit states

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5954

Title:	Equivalence of classicality and separability based on P phase–space representation of symmetric multiqubit states
Authors:	Usha Devi, A.R. Rajagopal, A.K. Sudha Karthik, H.S. Tej, Prabhu J.
Keywords:	Non-classicality Separability Quantum entanglement Phase space representation Symmetric multiqubit states
Issue Date:	Dec-2013
Publisher:	Springer
Citation:	Quantum information processing, 2013, Vol.12, p3717-3723
Abstract:	Classical and quantum world views differ in peculiar ways. Understanding decisive quantum features—for which no classical explanation exist—and their interrelations is of foundational interest. Moreover, recognizing non-classical features carries practical significance in information processing tasks as it offers insights as to why quantum protocols work better than their classical counterparts. We focus here on two celebrated notions of non-classicality viz., negativity of P phase–space representation and entanglement in symmetric multiqubit systems. We prove that they imply each other.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/5954
ISSN:	1570-0755 1573-1332 (Online)
Alternative Location:	http://arxiv.org/abs/1306.2825 http://dx.doi.org/10.1007/s11128-013-0627-4
Copyright:	2013 Springer Science+Business Media
Appears in Collections:	Research Papers (LAMP)

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