Mixedness and entanglement for two-mode Gaussian states
We analytically exploit the two-mode Gaussian states nonunitary dynamics. We show that in the zero temperature limit, entanglement sudden death (ESD) will always occur for symmetric states (where initial single-mode compression is z 0 ) provided that the two mode squeezing r 0 satisfies 0 < r 0 &...
| Authors: | , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2012 |
| Country: | Brasil |
| Institution: | Universidade Federal de Viçosa (UFV) |
| Repository: | LOCUS Repositório Institucional da UFV |
| Language: | English |
| OAI Identifier: | oai:locus.ufv.br:123456789/21827 |
| Online Access: | https://doi.org/10.1016/j.optcom.2012.07.004 http://www.locus.ufv.br/handle/123456789/21827 |
| Access Level: | Open access |
| Keyword: | Gaussian states Decoherence Entanglement |
| Summary: | We analytically exploit the two-mode Gaussian states nonunitary dynamics. We show that in the zero temperature limit, entanglement sudden death (ESD) will always occur for symmetric states (where initial single-mode compression is z 0 ) provided that the two mode squeezing r 0 satisfies 0 < r 0 < ½ log (cosh(2z 0)). We also give the analytical expressions for the time of ESD. Finally, we show the relation between the single modes initial impurities and the initial entanglement, where we exhibit that the latter is suppressed by the former. |
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