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arxiv: 0708.1361 · v1 · submitted 2007-08-10 · 🪐 quant-ph · cond-mat.other

Stationary photon-atom entanglement and flow equation

classification 🪐 quant-ph cond-mat.other
keywords flowentanglementequationmethodphoton-atomstationaryunitaryanalyzed
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Stationary photon-atom entanglement is discussed by applying the method of flow equation to the Jaynes-Cummings model. A nonlocal continuous unitary transformation is explicitly constructed and the associated positive operator-valued measures for the photons and atom are obtained. Then, flow of the entanglement entropy is analyzed. A comment is also made on implementing the unitary operation in the method of flow equation. This method may offer a new strategy for quantum-state engineering.

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