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arXiv · 1110.4593

Possibility of "magic" trapping of three-level system for Rydberg blockade implementation

Muir J. Morrison·Andrei Derevianko
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Abstract

The Rydberg blockade mechanism has shown noteworthy promise for scalable quantum computation with neutral atoms. Both qubit states and gate-mediating Rydberg state belong to the same optically-trapped atom. The trapping fields, while being essential, induce detrimental decoherence. Here we theoretically demonstrate that this Stark-induced decoherence may be completely removed using powerful concepts of "magic" optical traps. We analyze "magic" trapping of a prototype three-level system: a Rydberg state along with two qubit states: hyperfine states attached to a J=1/2 ground state. Our numerical results show that, while such a "magic" trap for alkali metals would require prohibitively large magnetic fields, the group IIIB metals such as Al are suitable candidates.

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Muir J. Morrison, Andrei Derevianko. 2011-10-20. Possibility of "magic" trapping of three-level system for Rydberg blockade implementation. https://doi.org/10.1103/physreva.85.033414

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