https://doi.org/10.1140/epjd/e2004-00086-2
Scheme for the generation of entangled atomic state in cavity QED
1
Laboratory for High Intensity Optics, Shanghai Institute of Optics
and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, P.R. China
2
Department of Chemistry, University of Antwerp, Universiteitsplein
1, 2610 Wilrijk-Antwerp, Belgium
3
Department of Physics, Blk S12, National University of Singapore 2, Science Drive 3, 117542 Singapore
Corresponding author: a xlfeng@mail.siom.ac.cn
Received:
3
April
2003
Revised:
20
February
2004
Published online:
6
July
2004
We propose a scheme to generate the entangled state of two 
-type
three-level atoms trapped in a cavity. The atoms are initially prepared in
their excited state and the cavity in vacuum state. Each atom has two
possibilities to deexcite to one of the ground states. If two different
polarized photons are detected subsequently, it is sure that both atoms are
in different ground states. But which atom is in which ground state cannot
be determined, the atoms are thus prepared in a superposition of two ground
states, i.e., an entangled state. In comparison with the proposal of Hong
and Lee [Phys. Rev. Lett. 89, 237901 (2002)], the requirement of a
single polarized photon source can be avoided in our scheme.
PACS: 03.67.Mn – Entanglement production, characterization and manipulation / 42.50.Ct – Quantum description of interaction of light and matter; related experiments
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
