| 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 |
