Entanglement dynamics during decoherence
The evolution of the entanglement between oscillators that interact with the same environment displays highly non-trivial behavior in the long time regime. When the oscillators only interact through the environment, three dynamical phases were identified (Paz and Roncaglia in Phys Rev Lett 100:22040...
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2009
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15700755_v8_n6_p535_Paz http://hdl.handle.net/20.500.12110/paper_15700755_v8_n6_p535_Paz |
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paper:paper_15700755_v8_n6_p535_Paz2023-06-08T16:24:13Z Entanglement dynamics during decoherence Paz, Juan Pablo Roncaglia, Augusto José Decoherence Entanglement Quantum Brownian Motion Arbitrary temperature Decoherence Dynamical phasis Entanglement dynamics Master equations Non-trivial Quantum Brownian motions Sudden deaths Three phasis Time regime Brownian movement Equations of motion Phase diagrams Quantum entanglement The evolution of the entanglement between oscillators that interact with the same environment displays highly non-trivial behavior in the long time regime. When the oscillators only interact through the environment, three dynamical phases were identified (Paz and Roncaglia in Phys Rev Lett 100:220401, 2008) and a simple phase diagram characterizing them was presented. Here we generalize those results to the cases where the oscillators are directly coupled and we show how a degree of mixidness can affect the final entanglement. In both cases, entanglement dynamics is fully characterized by three phases (SD: sudden death, NSD: no-sudden death and SDR: sudden death and revivals) which cover a phase diagram that is a simple variant of the previously introduced one. We present results when the oscillators are coupled to the environment through their position and also for the case where the coupling is symmetric in position and momentum (as obtained in the RWA). As a bonus, in the last case we present a very simple derivation of an exact master equation valid for arbitrary temperatures of the environment. © 2009 Springer Science+Business Media, LLC. Fil:Paz, J.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Roncaglia, A.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15700755_v8_n6_p535_Paz http://hdl.handle.net/20.500.12110/paper_15700755_v8_n6_p535_Paz |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Decoherence Entanglement Quantum Brownian Motion Arbitrary temperature Decoherence Dynamical phasis Entanglement dynamics Master equations Non-trivial Quantum Brownian motions Sudden deaths Three phasis Time regime Brownian movement Equations of motion Phase diagrams Quantum entanglement |
| spellingShingle |
Decoherence Entanglement Quantum Brownian Motion Arbitrary temperature Decoherence Dynamical phasis Entanglement dynamics Master equations Non-trivial Quantum Brownian motions Sudden deaths Three phasis Time regime Brownian movement Equations of motion Phase diagrams Quantum entanglement Paz, Juan Pablo Roncaglia, Augusto José Entanglement dynamics during decoherence |
| topic_facet |
Decoherence Entanglement Quantum Brownian Motion Arbitrary temperature Decoherence Dynamical phasis Entanglement dynamics Master equations Non-trivial Quantum Brownian motions Sudden deaths Three phasis Time regime Brownian movement Equations of motion Phase diagrams Quantum entanglement |
| description |
The evolution of the entanglement between oscillators that interact with the same environment displays highly non-trivial behavior in the long time regime. When the oscillators only interact through the environment, three dynamical phases were identified (Paz and Roncaglia in Phys Rev Lett 100:220401, 2008) and a simple phase diagram characterizing them was presented. Here we generalize those results to the cases where the oscillators are directly coupled and we show how a degree of mixidness can affect the final entanglement. In both cases, entanglement dynamics is fully characterized by three phases (SD: sudden death, NSD: no-sudden death and SDR: sudden death and revivals) which cover a phase diagram that is a simple variant of the previously introduced one. We present results when the oscillators are coupled to the environment through their position and also for the case where the coupling is symmetric in position and momentum (as obtained in the RWA). As a bonus, in the last case we present a very simple derivation of an exact master equation valid for arbitrary temperatures of the environment. © 2009 Springer Science+Business Media, LLC. |
| author |
Paz, Juan Pablo Roncaglia, Augusto José |
| author_facet |
Paz, Juan Pablo Roncaglia, Augusto José |
| author_sort |
Paz, Juan Pablo |
| title |
Entanglement dynamics during decoherence |
| title_short |
Entanglement dynamics during decoherence |
| title_full |
Entanglement dynamics during decoherence |
| title_fullStr |
Entanglement dynamics during decoherence |
| title_full_unstemmed |
Entanglement dynamics during decoherence |
| title_sort |
entanglement dynamics during decoherence |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15700755_v8_n6_p535_Paz http://hdl.handle.net/20.500.12110/paper_15700755_v8_n6_p535_Paz |
| work_keys_str_mv |
AT pazjuanpablo entanglementdynamicsduringdecoherence AT roncagliaaugustojose entanglementdynamicsduringdecoherence |
| _version_ |
1768544152268570624 |