dorsal/arxiv
View SchemaTwo-mode squeezed vacuum state coupled to the common thermal reservoir
| Authors | Jakub S. Prauzner-Bechcicki |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0211114 |
| URL | https://arxiv.org/abs/quant-ph/0211114 |
| Journal | J. Phys. A 37, (2004) L173 - L181 |
Abstract
Entangled states play a crucial role in quantum information protocols, thus the dynamical behavior of entanglement is of a great importance. In this paper we consider a two-mode squeezed vacuum state coupled to one thermal reservoir as a model of an entangled state embedded in an environment. As a criterion for entanglement we use a continuous-variable equivalent of the Peres-Horodecki criterion, namely the Simon criterion. To quantify entanglement we use the logarithmic negativity. We derive a condition, which assures that the state remains entangled in spite of the interaction with the reservoir. Moreover for the case of interaction with vacuum as an environment we show that a state of interest after intinitely long interaction is not only entangled, but also pure. For comparison we also consider a model in which each of both modes is coupled to its own reservoir.
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"abstract": "Entangled states play a crucial role in quantum information protocols, thus\nthe dynamical behavior of entanglement is of a great importance. In this paper\nwe consider a two-mode squeezed vacuum state coupled to one thermal reservoir\nas a model of an entangled state embedded in an environment. As a criterion for\nentanglement we use a continuous-variable equivalent of the Peres-Horodecki\ncriterion, namely the Simon criterion. To quantify entanglement we use the\nlogarithmic negativity. We derive a condition, which assures that the state\nremains entangled in spite of the interaction with the reservoir. Moreover for\nthe case of interaction with vacuum as an environment we show that a state of\ninterest after intinitely long interaction is not only entangled, but also\npure. For comparison we also consider a model in which each of both modes is\ncoupled to its own reservoir.",
"arxiv_id": "quant-ph/0211114",
"authors": [
"Jakub S. Prauzner-Bechcicki"
],
"categories": [
"quant-ph"
],
"journal_ref": "J. Phys. A 37, (2004) L173 - L181",
"title": "Two-mode squeezed vacuum state coupled to the common thermal reservoir",
"url": "https://arxiv.org/abs/quant-ph/0211114"
},
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