Decrease of the decay rate of the entanglement of a system of two entangled qubits by increasing the temperature of the thermal bath
| Autor: | Gonzalez Henao, Julio Cesar, 1987, Roversi, José Antonio, 1947 |
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| Přispěvatelé: | UNIVERSIDADE ESTADUAL DE CAMPINAS |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Repositório da Produção Científica e Intelectual da Unicamp Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP |
| Popis: | Agradecimentos: This work was supported by Capes (Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior). We are also grateful for the financial support by CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico). This work is also linked to CEPOF (Centro de Pesquisa em Optica e Fotonica, FAPESP). The authors would like to thank professor Mohinder Paul Sharma and Ph.D. E. L. J. Borda for his valuable comments Abstract: We have investigated the effects of indirect coupling between a nonlinear system of two qubits, initially prepared in an entangled state, and a thermal bath. We obtained an analytical solution for this system that allowed us to analyze the effects of high temperature on the entanglement. We found a nonintuitive behavior: Higher thermal reservoir temperatures imply smaller decay rates of entanglement. The indirect coupling between the two-qubit system and a thermal bath, via a third qubit that is also a two-level system acting as a structured reservoir, it is capable of slowing down of the losses of entanglement, despite the destructive effects of the environment. This third qubit is responsible for substantially suppressing the decoherence effects on the degree of entanglement of the two-qubit system COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP Fechado |
| Databáze: | OpenAIRE |
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