arXiv:1202.5382 · Physical Review A

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

Shi‐Biao Zheng

Published Dec 20, 2002• 134 citations

Abstract

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.

DOI: 10.1103/physreva.66.060303

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