Macroscopic displaced thermal field as the entanglement catalyst

Details Macroscopic displaced thermal field as the entanglement catalyst Macroscopic displaced thermal field as the entanglement catalyst

2012-03-07

arxiv.org/abs/1203.1455v1

Physics

Quantum Physics

Quantum Information & Computation Volume 7 Issue 8, November 2007

Scientific paper

We show that entanglement of multiple atoms can arise via resonant interaction with a displaced thermal field with a macroscopic photon-number. The cavity field acts as the catalyst, which is disentangled with the atomic system after the operation. Remarkably, the entanglement speed does not decrease as the average photon-number of the mixed thermal state increases. The atoms may evolve to a highly entangled state even when the photon-number of the cavity mode approaches infinity.

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