Application of Rydberg atoms to quantum computing

D. B. Tretyakov; I. I. Beterov; V. M. Entin; I. I. Ryabtsev

doi:10.1117/12.683123

31 May 2006 Application of Rydberg atoms to quantum computing

D. B. Tretyakov, I. I. Beterov, V. M. Entin, I. I. Ryabtsev

Proceedings Volume 6264, Quantum Informatics 2005; 62640I (2006) https://doi.org/10.1117/12.683123
Event: Quantum Informatics 2005, 2005, Moscow, Russian Federation

Abstract

Experimental aspects of an application of Rydberg atoms to quantum computing are studied. A single neutral atom trapped in an antinode of the optical lattice can represent a quantum bit. Laser excitation of two atoms in neighboring antinodes allows for obtaining of quantum entanglement of the atoms via dipole-dipole interaction which is strong for high Rydberg states. A two-qubit operation could be realized in this way. The optimal values of a principal quantum number, an interatomic distance, time of a single two-qubit operation and other parameters have been estimated. The estimates were done for ²³Na and ⁸⁷Rb atoms. Also experimental results of microwave spectroscopy of a few sodium Rydberg atoms at the one-photon 37S_1/2 -> 37P_1/2 and two-photon 37S_1/2 -> 38S_1/2 transitions are presented. Microwave spectroscopy can be used to detect dipole-dipole interaction between a few Rydberg atoms. The calculations showing an influence of dipole-dipole interaction on two-atom spectra are also presented. A noticeable broadening of the five-atom spectrum was observed in the experiment due to the dipole-dipole interaction.

Citation Download Citation

D. B. Tretyakov, I. I. Beterov, V. M. Entin, and I. I. Ryabtsev "Application of Rydberg atoms to quantum computing", Proc. SPIE 6264, Quantum Informatics 2005, 62640I (31 May 2006); https://doi.org/10.1117/12.683123

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