Fast Rydberg gates without dipole blockade via quantum control

✍ Scribed by M. Cozzini; T. Calarco; A. Recati; P. Zoller

• Book ID: 103872544
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 298 KB
• Volume: 264
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2006.01.060

✦ Synopsis

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.