Remanent quantum correlations in dissipative qubits
Starting from the exact evolution of a Markovian dissipative quantum walk, a non-Markovian decoherence of two qubits interacting with a phonon thermal bath has been investigated analytically using quantum information tools. Concurrence and quantum discord are affected in a complex way, showing that...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/2415 |
| Acceso en línea: | http://hdl.handle.net/11336/2415 |
| Access Level: | acceso abierto |
| Palabra clave: | Quantum Walk Non-Markovian Decoherence Quantum Correlations Qubits Master Equation https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | Starting from the exact evolution of a Markovian dissipative quantum walk, a non-Markovian decoherence of two qubits interacting with a phonon thermal bath has been investigated analytically using quantum information tools. Concurrence and quantum discord are affected in a complex way, showing that entanglement decreases with dissipation. At the limit where dissipation dominates, quantum correlations survive in time as $propto t^{-1/2}.$ Thus, even under the influence of dissipation two qubits retain their quantumness for a long time. Quantum correlations could be therefore observed for a long time in related photonic experiments. |
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