Entanglement Dynamics in Open Two-Qubit Systems via Diffusive Quantum Trajectories
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Guevara, Ivonne
Carvalho, Andre RR
Busse, Marc
Buchleitner, Andreas
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Abstract
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. © 2010 The American Physical Society.
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Physical Review Letters
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105
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21
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© 2010 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
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Mathematical sciences
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Physics, Multidisciplinary
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Viviescas, C; Guevara, I; Carvalho, ARR; Busse, M; Buchleitner, A, Entanglement Dynamics in Open Two-Qubit Systems via Diffusive Quantum Trajectories, Physical Review Letters, 2010, 105 (21), pp. 210502:1-210502:4