https://doi.org/10.1140/epjd/e2002-00131-2
Storage states in ultracold collective atoms
1
CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China
and
Department of Physics, Beijing Normal University, Beijing 100875, P.R. China
2
Department of Physics, Hong Kong Baptist University, Hong Kong, P.R. China
Corresponding author: a wangkg@bnu.edu.cn
Received:
15
January
2002
Revised:
8
April
2002
Published online:
19
July
2002
We present a complete theoretical description of atomic storage states in the multimode framework by including spatial coherence in atomic collective operators and atomic storage states. We show that atomic storage states are Dicke states with the maximum cooperation number. In some limits, a set of multimode atomic storage states has been established in correspondence with multimode Fock states of the electromagnetic field. This gives better understanding of both the quantum and coherent information of optical field can be preserved and recovered in ultracold medium. In this treatment, we discuss in detail both the adiabatic and dynamic transfer of quantum information between the field and the ultracold medium.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light / 03.67.-a – Quantum information
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
