https://doi.org/10.1140/epjd/e2012-30288-8
Regular Article
Controllable band loops of ultracold atoms in a cavity
1 School of Mathematics and Computer
Science, Guizhou Normal University, Guiyang
550001, P.R.
China
2 Institute of Applied Physics and
Computational Mathematics, P.O.
Box 8009 (28),
Beijing
100088, P.R.
China
a e-mail: lbfu@iapcm.ac.cn
Received:
3
May
2012
Received in final form:
22
August
2012
Published online:
25
October
2012
We theoretically investigate the atomic energy band of ultracold atoms inside a laser-driven optical cavity with Kerr medium. This cavity-atom hybrid system has two kinds of interactions: photon-atom interaction and photon-photon one. We find the loops of the atomic energy band induced by photon-atom interaction disappear when the Kerr interaction between photons exceeds a critical value. The reason of the controllably atomic energy band loops by Kerr interaction is discussed.
Key words: Cold Matter and Quantum Gas
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2012