Quantum information processing and multiatom entanglement engineering with a thermal cavity

Details Quantum information processing and multiatom entanglement engineering with a thermal cavity Quantum information processing and multiatom entanglement engineering with a thermal cavity

2012-02-24

arxiv.org/abs/1202.5382v1

Phys. Rev. A 66, 060303(R) (2002)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.66.060303

We propose a scheme for realizing two-qubit quantum phase gates with atoms in a thermal cavity. The photon-number dependent parts in the evolution operator are canceled with the assistant of a strong classical field. Thus the scheme is insensitive to the thermal field. In the scheme the detuning between the atoms and the cavity is equal to the atom-cavity coupling strength and thus the gates operate at a high speed, which is also important in view of decoherence. The scheme can be generalized to generate multiatom entangled states with a thermal cavity.

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