期刊
OPTICS COMMUNICATIONS
卷 264, 期 2, 页码 375-384出版社
ELSEVIER
DOI: 10.1016/j.optcom.2006.01.060
关键词
quantum phase gate; Rydberg states
类别
We propose a scheme for controlling interactions between Rydberg-excited neutral atoms in order to perform a fast high-fidelity quantum gate. Unlike dipole-blockade mechanisms already found in the literature, we drive resonantly the atoms with a state-dependent excitation to Rydberg levels, and we exploit the resulting dipole-dipole interaction to induce a controlled atomic motion in the trap, in a similar way as discussed in recent ion-trap quantum computing proposals. This leads atoms to gain the required gate phase, which turns out to be a combination of a dynamic and a geometrical contribution. The fidelity of this scheme is studied including small anharmonicity and temperature effects, with promising results for reasonably achievable experimental parameters. (c) 2006 Elsevier B.V. All rights reserved.
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