{"id":447,"date":"2013-08-04T17:04:21","date_gmt":"2013-08-05T00:04:21","guid":{"rendered":"http:\/\/www.dereviankogroup.com\/?p=447"},"modified":"2013-10-07T09:27:39","modified_gmt":"2013-10-07T16:27:39","slug":"magic-rydberg","status":"publish","type":"post","link":"https:\/\/www.dereviankogroup.com\/dereviankogroup\/rightthere\/magic-rydberg\/","title":{"rendered":"Magic Rydberg"},"content":{"rendered":"

 <\/p>\n

\"Rydberg<\/a>

Rydberg atoms in circular states can be attracted to laser intensity maxima. Thereby a laser beam can serve as a tractor beam for cold Rydberg atoms.<\/p><\/div>\n

Here is our recent paper \u00a0on the possibility of decoherence-free design of quantum gates mediated by Rydberg-excited neutral atoms. This quantum computing architecture utilizes atoms \u00a0trapped in optical fields, e.g., in optical lattices. In order to reduce motional dephasing we determine trapping conditions where AC Stark shifts of both ground and Rydberg levels are the same (so-called magic trapping).<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

Intensity landscape and the possibility of magic trapping of alkali Rydberg atoms in infrared optical lattices<\/strong>, T. Topcu and A. Derevianko,\u00a0arxiv.org:1305.6570<\/a><\/em><\/p>\n

Motivated by compelling advances in manipulating cold Rydberg \u00a0atoms in optical traps, we consider the effect of large extent of Rydberg\u00a0electron wave function on trapping potentials. We find that when the Rydberg\u00a0orbit lies outside inflection points in laser intensity landscape, the atom can stably reside in laser intensity maxima. Effectively, the free-electron \u00a0polarizability of Rydberg\u00a0electron is modulated by intensity landscape and can accept both positive and negative values. We apply these insights to determining magic wavelengths for Rydberg-ground-state transitions for alkali atoms trapped in infrared optical lattices. We find magic wavelengths to be around 10 um, with exact values that depend on Rydberg\u00a0state quantum numbers.<\/em><\/p>\n

This result is somewhat unusual and more details can be found in this talk (link to pdf)\u00a0<\/a>\u00a0given at the Dresden workshop on ultracold Rydberg physics.<\/p>\n

UPDATE<\/strong>: published:\u00a0Phys. Rev. A 88, 043407 (2013)<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

  Here is our recent paper \u00a0on the possibility of decoherence-free design of quantum gates mediated by Rydberg-excited neutral atoms. This quantum computing architecture utilizes atoms \u00a0trapped in optical fields, e.g., in optical lattices. 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