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

Viviescas, Carlos; Guevara, Ivonne; Carvalho, Andre; Busse, Marc; Buchleitner, Andreas


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.

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.105.210502


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