https://doi.org/10.1140/epjd/e2010-09661-x
Entangled entanglement in Raman lasers
Department of Physics, Huazhong Normal University,
Wuhan
430079, P.R.
China
a e-mail: xmhu@phy.ccnu.edu.cn
Received:
29
December
2009
Received in final form:
24
June
2010
Published online:
4
February
2011
We show that entangled entanglement can be obtained from a multimode Raman laser. In this system, all lasing modes constitute a quantum-beat. Equivalently, one collective mode is operated well above threshold and exhibits the sub-Poissonian statistics, while other orthonormal collective modes are excluded from the interacting system and stay in vacuum states. This determines entanglement between any two sub-collections, in each of which exists entanglement between any two sub-sub-collections, and so on, if present. This scheme is accessible based on the recent experimental progress in Raman lasers.
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2011
