Entanglement Dynamics in Open Two-Qubit Systems via Diffusive Quantum Trajectories

被引：36
|
作者：
Viviescas, Carlos [1 ]
Guevara, Ivonne [1 ]
Carvalho, Andre R. R. [2 ]
Busse, Marc [3 ]
Buchleitner, Andreas [4 ]
机构：
[1] Univ Nacl Colombia, Dept Fis, Bogota, DC, Colombia
[2] Australian Natl Univ, Res Sch Phys & Engn, Dept Quantum Sci, Australian Ctr Quantum Atom Opt, Canberra, ACT 0200, Australia
[3] Univ Munich, Inst Theoret Phys, D-80033 Munich, Germany
[4] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.105.210502
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页数：4
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