https://doi.org/10.1140/epjd/e2007-00169-6
Generation of entanglement via atomic coherence in a two-mode three-level cascade atomic system
Department of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
Corresponding author: a xyping@smail.hust.edu.cn
Received:
10
January
2007
Revised:
3
April
2007
Published online:
23
May
2007
The generation of continuous variable entanglement via atomic coherence in a two-mode three-level cascade atomic system is discussed according to the entanglement criterion proposed by Duan et al. [Phys. Rev. Lett. 84, 2722 (2000)]. Atomic coherence between the top and bottom levels is induced with two photons of a strong external pump field. It shows that entanglement for the two-mode field in the cavity can be generated under certain conditions. Moreover, by means of the input-output theory, we show that the two-mode entanglement could also be approached at the output.
PACS: 42.50.Dv – Nonclassical states of the electromagnetic field, including entangled photon states; quantum state engineering and measurements / 03.65.Ud – Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007
