Related papers: Long-lived circular Rydberg states of laser-cooled Rubidium atoms in a cryostat

Long-lived circular Rydberg states of laser-cooled Rubidium atoms in a cryostat

URL: http://arxiv.org/abs/2002.02893v2
Date: Thu, 12 Mar 2020 12:49:00 GMT
Title: Long-lived circular Rydberg states of laser-cooled Rubidium atoms in a cryostat
Authors: Tigrane Cantat-Moltrecht, Rodrigo Corti\~nas, Brice Ravon, Paul M\'ehaignerie, Serge Haroche, Jean-Michel Raimond, Maxime Favier, Michel Brune, Cl\'ement Sayrin
Abstract summary: We demonstrate the preparation of long-lived circular Rydberg levels of laser-cooled Rubidium atoms in a cryostat. We estimate in situ the microwave BBR temperature to be $(11pm 2),mathrmK$. This work opens interesting perspectives for quantum simulation and sensing with cold circular Rydberg atoms.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: The exquisite properties of Rydberg levels make them particularly appealing for emerging quantum technologies. The lifetime of low-angular-momentum laser-accessible levels is however limited to a few $100\,\mu\mathrm{s}$ by optical transitions and microwave blackbody radiation (BBR) induced transfers at room temperature. A considerable improvement would be obtained with the few $10\,\mathrm{ms}$ lifetime of circular Rydberg levels in a cryogenic environment reducing the BBR temperature. We demonstrate the preparation of long-lived circular Rydberg levels of laser-cooled Rubidium atoms in a cryostat. We observe a $3.7\,\mathrm{ms}$ lifetime for the circular level of principal quantum number $n=52$. By monitoring the transfers between adjacent circular levels, we estimate in situ the microwave BBR temperature to be $(11\pm 2)\,\mathrm{K}$. The measured atomic coherence time ($270\,\mu\mathrm{s}$) is limited here only by technical magnetic field fluctuations. This work opens interesting perspectives for quantum simulation and sensing with cold circular Rydberg atoms.

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