Quantum phase gate through a dispersive atom-field interaction

Journal Article · Fri Jun 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.064301· OSTI ID:21000553

Xubo, Zou; Yunfeng, Xiao; Yong, Yang; Guangcan, Guo ^[1]; Shangbin, Li ^[2]

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1. Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026 (China)
2. Shanghai Research Center of Amertron-global, Zhangjiang High-Tech Park, 299 Lane, Bishen Road No. 3, Suite 203, Shanghai (China)

We propose a scheme for realizing a two-qubit quantum phase gate between atoms inside a high-Q optical cavity. In the scheme, the dispersive interaction between atoms and the cavity field induces photon-number Stark shift, which can yield a resonant interaction inside one selected atom-field subspace and leave the others in a highly dispersive regime. Due to the selective atom-cavity interaction, (1) the scheme only requires commonly addressing the atoms inside the optical cavity during the gate operation, and (2) it can be directly used to implement an N-qubit conditional phase gate. These properties can significantly reduce the number of operations for implementing quantum computation and quantum algorithms.

• OSTI ID: 21000553
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 75; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGORITHMS
ATOMS
INFORMATION THEORY
INTERACTIONS
OPERATION
PHOTONS
QUANTUM COMPUTERS
QUANTUM MECHANICS
QUBITS
STARK EFFECT