Manipulating Rydberg atoms close to surfaces at cryogenic temperatures. Thiele, T., Filipp, S., Agner, J. A., Schmutz, H., Deiglmayr, J., Stammeier, M., Allmendinger, P., Merkt, F., & Wallraff, A. Physical Review A, 90(1):013414, July, 2014. ![Manipulating Rydberg atoms close to surfaces at cryogenic temperatures [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Helium atoms in Rydberg states have been manipulated coherently with microwave radiation pulses near a gold surface and near a superconducting NbTiN surface at a temperature of 3K. The experiments were carried out with a skimmed supersonic beam of metastable (1s)1(2s)11S0 helium atoms excited with laser radiation to np Rydberg levels with principal quantum number n between 30 and 40. The separation between the cold surface and the center of the collimated beam is adjustable down to 250μm. Short-lived np Rydberg states were coherently transferred to the long-lived ns state to avoid radiative decay of the Rydberg atoms between the photoexcitation region and the region above the cold surfaces. Further coherent manipulation of the ns Rydberg states with pulsed microwave radiation above the surfaces enabled measurements of stray electric fields and allowed us to study the decoherence of the atomic ensemble. Adsorption of residual gas onto the surfaces and the resulting slow buildup of stray fields was minimized by controlling the temperature of the surface and monitoring the partial pressures of H2O, N2, O2, and CO2 in the experimental chamber during the cool-down procedure. Compensation of the stray electric fields to levels below 100mV/cm was achieved over a region of 6mm along the beam-propagation direction which, for the 1770-m/s beam velocity, implies the possibility to preserve the coherence of the atomic sample for several microseconds above the cold surfaces.
@article{thiele_manipulating_2014,
title = {Manipulating {Rydberg} atoms close to surfaces at cryogenic temperatures},
volume = {90},
url = {http://link.aps.org/doi/10.1103/PhysRevA.90.013414},
doi = {10.1103/PhysRevA.90.013414},
abstract = {Helium atoms in Rydberg states have been manipulated coherently with microwave radiation pulses near a gold surface and near a superconducting NbTiN surface at a temperature of 3K. The experiments were carried out with a skimmed supersonic beam of metastable (1s)1(2s)11S0 helium atoms excited with laser radiation to np Rydberg levels with principal quantum number n between 30 and 40. The separation between the cold surface and the center of the collimated beam is adjustable down to 250μm. Short-lived np Rydberg states were coherently transferred to the long-lived ns state to avoid radiative decay of the Rydberg atoms between the photoexcitation region and the region above the cold surfaces. Further coherent manipulation of the ns Rydberg states with pulsed microwave radiation above the surfaces enabled measurements of stray electric fields and allowed us to study the decoherence of the atomic ensemble. Adsorption of residual gas onto the surfaces and the resulting slow buildup of stray fields was minimized by controlling the temperature of the surface and monitoring the partial pressures of H2O, N2, O2, and CO2 in the experimental chamber during the cool-down procedure. Compensation of the stray electric fields to levels below 100mV/cm was achieved over a region of 6mm along the beam-propagation direction which, for the 1770-m/s beam velocity, implies the possibility to preserve the coherence of the atomic sample for several microseconds above the cold surfaces.},
number = {1},
urldate = {2014-10-15},
journal = {Physical Review A},
author = {Thiele, T. and Filipp, S. and Agner, J. A. and Schmutz, H. and Deiglmayr, J. and Stammeier, M. and Allmendinger, P. and Merkt, F. and Wallraff, A.},
month = jul,
year = {2014},
keywords = {Cavity QED},
pages = {013414},
}
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The separation between the cold surface and the center of the collimated beam is adjustable down to 250μm. Short-lived np Rydberg states were coherently transferred to the long-lived ns state to avoid radiative decay of the Rydberg atoms between the photoexcitation region and the region above the cold surfaces. Further coherent manipulation of the ns Rydberg states with pulsed microwave radiation above the surfaces enabled measurements of stray electric fields and allowed us to study the decoherence of the atomic ensemble. Adsorption of residual gas onto the surfaces and the resulting slow buildup of stray fields was minimized by controlling the temperature of the surface and monitoring the partial pressures of H2O, N2, O2, and CO2 in the experimental chamber during the cool-down procedure. Compensation of the stray electric fields to levels below 100mV/cm was achieved over a region of 6mm along the beam-propagation direction which, for the 1770-m/s beam velocity, implies the possibility to preserve the coherence of the atomic sample for several microseconds above the cold surfaces.","number":"1","urldate":"2014-10-15","journal":"Physical Review A","author":[{"propositions":[],"lastnames":["Thiele"],"firstnames":["T."],"suffixes":[]},{"propositions":[],"lastnames":["Filipp"],"firstnames":["S."],"suffixes":[]},{"propositions":[],"lastnames":["Agner"],"firstnames":["J.","A."],"suffixes":[]},{"propositions":[],"lastnames":["Schmutz"],"firstnames":["H."],"suffixes":[]},{"propositions":[],"lastnames":["Deiglmayr"],"firstnames":["J."],"suffixes":[]},{"propositions":[],"lastnames":["Stammeier"],"firstnames":["M."],"suffixes":[]},{"propositions":[],"lastnames":["Allmendinger"],"firstnames":["P."],"suffixes":[]},{"propositions":[],"lastnames":["Merkt"],"firstnames":["F."],"suffixes":[]},{"propositions":[],"lastnames":["Wallraff"],"firstnames":["A."],"suffixes":[]}],"month":"July","year":"2014","keywords":"Cavity QED","pages":"013414","bibtex":"@article{thiele_manipulating_2014,\n\ttitle = {Manipulating {Rydberg} atoms close to surfaces at cryogenic temperatures},\n\tvolume = {90},\n\turl = {http://link.aps.org/doi/10.1103/PhysRevA.90.013414},\n\tdoi = {10.1103/PhysRevA.90.013414},\n\tabstract = {Helium atoms in Rydberg states have been manipulated coherently with microwave radiation pulses near a gold surface and near a superconducting NbTiN surface at a temperature of 3K. The experiments were carried out with a skimmed supersonic beam of metastable (1s)1(2s)11S0 helium atoms excited with laser radiation to np Rydberg levels with principal quantum number n between 30 and 40. The separation between the cold surface and the center of the collimated beam is adjustable down to 250μm. Short-lived np Rydberg states were coherently transferred to the long-lived ns state to avoid radiative decay of the Rydberg atoms between the photoexcitation region and the region above the cold surfaces. Further coherent manipulation of the ns Rydberg states with pulsed microwave radiation above the surfaces enabled measurements of stray electric fields and allowed us to study the decoherence of the atomic ensemble. 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