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

Carlos Viviescas; Ivonne Guevara; André R.R. Carvalho; Marc Busse; Andreas Buchleitner

doi:10.1103/PhysRevLett.105.210502

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

Carlos Viviescas^*, Ivonne Guevara, André R.R. Carvalho, Marc Busse, Andreas Buchleitner

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

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.

Original language	English
Article number	210502
Journal	Physical Review Letters
Volume	105
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.105.210502
Publication status	Published - 17 Nov 2010

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title = "Entanglement dynamics in open two-qubit systems via diffusive quantum trajectories",

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.",

author = "Carlos Viviescas and Ivonne Guevara and Carvalho, \{Andr{\'e} R.R.\} and Marc Busse and Andreas Buchleitner",

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AU - Busse, Marc

AU - Buchleitner, Andreas

PY - 2010/11/17

Y1 - 2010/11/17

N2 - 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.

AB - 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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U2 - 10.1103/PhysRevLett.105.210502

DO - 10.1103/PhysRevLett.105.210502

M3 - Article

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VL - 105

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

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ER -

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

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