Density matrix negativity for two oscillators in an Agarwal bath

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Density matrix negativity for two oscillators in an Agarwal bath

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dc.contributor.author Zhao, Yang
dc.contributor.author Chen, Guan Hua
dc.date.accessioned 2011-03-07T06:10:21Z
dc.date.available 2011-03-07T06:10:21Z
dc.date.copyright 2002
dc.date.issued 2011-03-07T06:10:21Z
dc.identifier.citation Zhao, Y., & Chen, G. H. (2002). Density matrix negativity for two oscillators in an Agarwal bath. Physical Review E, (65), 1-15.
dc.identifier.uri http://hdl.handle.net/10220/6746
dc.description.abstract A system of two harmonic oscillators is placed in an Agarwal bath. The resulting quantum master equations are studied with the help of quantum characteristic functions. The density matrix positivity is investigated in view of the recent interest in searching for a sound quantum dissipation theory. An analytical criterion is derived for density matrix negativity for two uncoupled oscillators. It is found that, for an initial two-oscillator squeezed state with a real squeezing parameter s, density matrix negativity occurs for two uncoupled oscillators at temperatures lower than \v/(kB ln cothusu) with v the oscillator frequency and kB the Boltzmann factor. As a by-product an analytical expression is also obtained for determining the quantum separability of two uncoupled oscillators. The effects of interoscillator coupling on density matrix negativity are discussed.
dc.format.extent 15 p.
dc.language.iso en
dc.relation.ispartofseries Physical Review E
dc.rights © 2002 American Physical Society. This paper was published in Physical Review E and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at: [Doi: http://dx.doi.org/10.1103/PhysRevE.65.056120]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
dc.subject DRNTU::Science::Physics::Atomic physics::Quantum theory
dc.title Density matrix negativity for two oscillators in an Agarwal bath
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevE.65.056120
dc.description.version Published version

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