Quantum entanglement in dense multiqubit systems

Details Quantum entanglement in dense multiqubit systems Quantum entanglement in dense multiqubit systems

2009-11-06

arxiv.org/abs/0911.1223v1

Jr. of Modern Optics 14&15, 1287-1292 (2010)

Physics

Quantum Physics

6 pages, 6 figures

Scientific paper

The pairwise entanglement of an arbitrary atomic pair randomly extracted from a laser-driven dense multiqubit sample in the presence of quantum dissipation due to spontaneous emission is considered. The dipole-dipole interaction between the particles shifts the laser-qubit resonance frequency and consequently modifies the quantum entanglement. By means of an appropriate tuning of the laser frequency, one can optimize the entanglement in this system. For large ensembles, the maximum entanglement occurs near the laser parameters where the steady-state sample exhibits phase transition phenomena.

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