Entanglement dynamics in open two-qubit systems via diffusive quantum trajectories

Autor:	Viviescas, Carlos, Guevara, Ivonne, Carvalho, André R. R., Busse, Marc, Buchleitner, Andreas
Rok vydání:	2010
Předmět:	Quantum Physics
Zdroj:	Phys. Rev. Lett. 105, 210502 (2010)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.105.210502
Popis:	We use quantum diffusive trajectories to prove that the time evolution of two-qubit entanglement under spontaneous emission can be fully characterized by optimal continuous monitoring. We analytically determine this optimal unraveling and derive a deterministic evolution equation for the system's concurrence. Furthermore, we propose an experiment to monitor the entanglement dynamics in bipartite two-level systems and to determine the disentanglement time from a single trajectory. Comment: 4 pages, 2 figures, changed title, abstract and fig. 2, corrected typos
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1006.1452 Zobrazit plný text záznamu View this record from Arxiv