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Proceedings Paper

Role of an information-theoretic measure of quantum correlation in a dynamical phase transition of entanglement
Author(s): Himadri Shekhar Dhar; Rupamanjari Ghosh; Aditi Sen(De); Ujjwal Sen
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Paper Abstract

The nearest-neighbor entanglement of the evolved state of an asymmetric quantum XY spin chain, in a transverse time-dependent field, exhibits criticalities (dynamical phase transitions) as the initial field parameter is varied at a given fixed time. After a discussion of the dynamical phase transition, we investigate the extent to which the role of an information-theoretic quantum correlation measure, called quantum discord, can be used to understand the entanglement dynamics in this spin model. We show that quantum discord can be associated with the collapse and revival of nearest-neighbor entanglement exhibited in the critical behavior. This behavior of quantum discord leads to the broader question of whether certain classes of measures of nonclassical correlation can help to understand the non-generic features of entanglement in a given system.

Paper Details

Date Published: 23 August 2011
PDF: 7 pages
Proc. SPIE 8173, Photonics 2010: Tenth International Conference on Fiber Optics and Photonics, 81731P (23 August 2011); doi: 10.1117/12.900324
Show Author Affiliations
Himadri Shekhar Dhar, Jawaharlal Nehru Univ. (India)
Rupamanjari Ghosh, Jawaharlal Nehru Univ. (India)
Aditi Sen(De), Harish-Chandra Research Institute (India)
Ujjwal Sen, Harish-Chandra Research Institute (India)

Published in SPIE Proceedings Vol. 8173:
Photonics 2010: Tenth International Conference on Fiber Optics and Photonics
Sunil K. Khijwania; Banshi D. Gupta; Bishnu P. Pal; Anurag Sharma, Editor(s)

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