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Generation of two-mode entangled states in a four-level atomic system via the Raman process

Generation of two-mode entangled states in a four-level atomic system via the Raman process,10.1016/j.optcom.2010.07.069,Optics Communications,Hong-Ro

Generation of two-mode entangled states in a four-level atomic system via the Raman process  
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In this paper, we have theoretically investigated the generation of two-mode entangled states from a four-level atomic system via the Raman process. We show that the degree of entanglement between the two cavity modes could be strongly adjusted by both the Rabi frequencies and the detunings of the pumping fields. Our numerical results reveal that entanglement between the steady state of the two cavity modes depends on the difference of the two detunings of the atomic levels with the classical laser fields or the difference of the two Rabi frequencies. Finally, our result also shows that when such atomic system is operated above the threshold, it is possible to obtain the macroscopic entangled states.
Journal: Optics Communications - OPT COMMUN , vol. 283, no. 24, pp. 5269-5274, 2010
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