| Full text | |
| Author(s): |
Dodonov, A. V.
[1]
;
Dodonov, V. V.
;
Mizrahi, S. S.
Total Authors: 3
|
| Affiliation: | [1] Universidade Federal de São Carlos (UFSCAR). Centro de Ciências Exatas e de Tecnologia. Departamento de Física - Brasil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Journal of Physics A : Mathematical and General; v. 38, n. 3, p. 683-696, Jan. 2005. |
| Field of knowledge: | Physical Sciences and Mathematics - Physics |
| Abstract | |
We give a simplified form of Simon's separability criterion for two-mode Gaussian states, showing that for systems whose unitary evolution is governed by arbitrary time-dependent quadratic Hamiltonians, the separability dynamics is completely described in terms of the determinant of the cross-covariance matrix. As concrete examples, we consider the evolution of the 'inverse negativity coefficient' (which gives a quantitative estimation of the 'degree of entanglement') for two initially uncoupled modes (each being in a squeezed thermal state) in the cases of parametric converter, parametric amplifier and for a cavity whose boundary oscillates in resonance with two field modes. (AU) | |
| FAPESP's process: | 00/15084-5 - Atoms, ions and fields in traps and cavities |
| Grantee: | Salomon Sylvain Mizrahi |
| Support type: | Research Projects - Thematic Grants |