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Dynamics of Entanglement and the Schmidt Gap in a Driven Light-Matter System

Gómez-Ruiz, FJ and Mendoza-Arenas, JJ and Acevedo, OL and Rodríguez, FJ and Quiroga, L and Johnson, NF (2017) Dynamics of Entanglement and the Schmidt Gap in a Driven Light-Matter System. J. Phys. B: At. Mol. Opt. Phys. 2017.

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Abstract

The ability to modify light-matter coupling in time (e.g. using external pulses) opens up the exciting possibility of generating and probing new aspects of quantum correlations in many-body light-matter systems. Here we study the impact of such a pulsed coupling on the light-matter entanglement in the Dicke model as well as the respective subsystem quantum dynamics. Our dynamical many-body analysis exploits the natural partition between the radiation and matter degrees of freedom, allowing us to explore time-dependent intra-subsystem quantum correlations by means of squeezing parameters, and the inter-subsystem Schmidt gap for different pulse duration (i.e. ramping velocity) regimes -- from the near adiabatic to the sudden quench limits. Our results reveal that both types of quantities indicate the emergence of the superradiant phase when crossing the quantum critical point. In addition, at the end of the pulse light and matter remain entangled even though they become uncoupled, which could be exploited to generate entangled states in non-interacting systems.

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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Gómez-Ruiz, FJ
Mendoza-Arenas, JJ
Acevedo, OL
Rodríguez, FJ
Quiroga, L
Johnson, NF
Date: 2017
Journal or Publication Title: J. Phys. B: At. Mol. Opt. Phys. 2017
DOI or Unique Handle: 10.1088/1361-6455/aa9a92
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: Yes
Uncontrolled Keywords: quant-ph, quant-ph, cond-mat.stat-mech
Official URL: http://dx.doi.org/10.1088/1361-6455/aa9a92
Additional Information: 15 pages, 4 figures, Accepted for publication in Journal of Physics B, special issue Correlations in light-matter interactions
Date Deposited: 20 Feb 2023 20:08
Last Modified: 21 Aug 2024 17:20
URI: http://d-scholarship.pitt.edu/id/eprint/44212

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