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Quantum memory process with a four-level atomic ensemble |
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| Authors: | X.-J. Liu H. Jing M.-L. Ge |
| Affiliation: | (1) Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, P.R. China;(2) Theoretical Physics Division, Nankai Institute of Mathematics, Nankai University, Tianjin, 300071, P.R. China;(3) Liuhui Center for Applied Mathematics, Nankai University and Tianjin University, Tianjin, 300071, P.R. China;(4) State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, CAS, Wuhan, 430071, P.R. China |
| Abstract: | We examine in detail the quantum memory technique for photons in a double Λ atomic ensemble in this work. The novel application of the present technique to create two different quantum probe fields as well as entangled states of them is proposed. A larger zero-degeneracy class besides dark-state subspace is investigated and the adiabatic condition is confirmed in the present model. We extend the single-mode quantum memory technique to the case with multi-mode probe fields, and reveal the exact pulse matching phenomenon between two quantized pulses in the present system. |
| Keywords: | 03.67.Mn Entanglement production, characterization, and manipulation 42.50.Gy Effects of atomic coherence on propagation, absorption, and amplification of light electromagnetically induced transparency and absorption 03.65.Fd Algebraic methods |
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