A scheme is reported for generating a multi-atom cluster state in thermal cavities, which is based on the simultaneous interaction of two two-level atoms with a single-mode cavity field driven by a classical field. The photon-number-dependent parts in the evolution operator are cancelled with the assistant of a strong classical field, so the scheme is insensitive to the thermal field. In the present scheme, the detuning between the atoms and the cavity is equal to the atom-cavity coupling strength, thus the operation speed is greatly improved, which is important in view of decoherence.
© 2007 Chinese Optics Letters
(000.1600) General : Classical and quantum physics
(060.4510) Fiber optics and optical communications : Optical communications
(200.3050) Optics in computing : Information processing
(270.5580) Quantum optics : Quantum electrodynamics
Meifeng Chen, Songshe Ma, and Xiaolan Zhang, "Generation of cluster states in thermal cavity," Chin. Opt. Lett. 5, 364-366 (2007)