Quantum state transfer between field and atoms in Electromagnetically Induced Transparency

Details Quantum state transfer between field and atoms in Electromagnetically Induced Transparency Quantum state transfer between field and atoms in Electromagnetically Induced Transparency

2003-12-23

arxiv.org/abs/quant-ph/0312189v1

Physical Review A 69 (2004) 043810

Physics

Quantum Physics

8 pages, 4 figures

Scientific paper

10.1103/PhysRevA.69.043810

We show that a quasi-perfect quantum state transfer between an atomic ensemble and fields in an optical cavity can be achieved in Electromagnetically Induced Transparency (EIT). A squeezed vacuum field state can be mapped onto the long-lived atomic spin associated to the ground state sublevels of the Lambda-type atoms considered. The EIT on-resonance situation show interesting similarities with the Raman off-resonant configuration. We then show how to transfer the atomic squeezing back to the field exiting the cavity, thus realizing a quantum memory-type operation.

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