Journal
PHYSICAL REVIEW A
Volume 88, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.88.042314
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Funding
- National Basic Research Program of China [2010CB923102, 2011CB922203, 2012CB921603]
- national Natural Science Foundation of China [11174026, 11274210, 11264018]
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We present a theoretical scheme for the generation of four quantized modes in a three-level double-A atomic system driven by two counterpropagating far-detuned pump beams and find the entanglement between the four modes. By using the second-order perturbation method and the phase-matching condition for the four-wave mixing processes, the effective Hamiltonian is derived, which clearly illustrates the generation of four light beams and their entanglement. The dependence of the four-mode entanglement on interaction time, pump detuning, strength of interaction force, and the ratio of Rabi frequency of two pump beams is analyzed with inseparability. The result presented here provides a method for the experimental generation of multipartite entanglement in an atomic system.
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