High-resolution spectroscopy of Rydberg states in an ultracold cesium gas. Saßmannshausen, H., Merkt, F., & Deiglmayr, J. Physical Review A, 87(3):032519, 2013. ![High-resolution spectroscopy of Rydberg states in an ultracold cesium gas [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Transitions between high Rydberg states of 133Cs atoms have been studied by high-resolution millimeter-wave spectroscopy of an ultracold sample. The spectroscopic measurements were performed after releasing the atoms from a magneto-optical trap. Switching off all trapping fields and compensating the stray electric and magnetic fields to below 1 mV/cm and 2 mG, respectively, prior to the spectroscopic measurement enabled the recording of millimeter-wave spectra of Rydberg states with principal quantum number beyond n=100 under conditions where the inhomogeneous broadening by stray fields is minimal and no dephasing of the Rydberg-atom sample can be detected over measurement times up to 60 μs. The Fourier-transform-limited line widths of better than 20 kHz enabled the observation of the hyperfine structure of nS and nP Rydberg states of Cs beyond n=90. The analysis of the line shapes of transitions to Rydberg states with n≈230 indicated that field inhomogeneities across the atomic sample represent the dominant cause of spectral broadening at high n values. The analysis also revealed that the initial polarization of the atomic sample (F=4, MF=4) is preserved for several tens of microseconds, the depolarization being caused by slow precession along the magnetic stray fields.
@article{sasmannshausen_high-resolution_2013,
title = {High-resolution spectroscopy of {Rydberg} states in an ultracold cesium gas},
volume = {87},
url = {http://link.aps.org/doi/10.1103/PhysRevA.87.032519},
doi = {10.1103/PhysRevA.87.032519},
abstract = {Transitions between high Rydberg states of 133Cs atoms have been studied by high-resolution millimeter-wave spectroscopy of an ultracold sample. The spectroscopic measurements were performed after releasing the atoms from a magneto-optical trap. Switching off all trapping fields and compensating the stray electric and magnetic fields to below 1 mV/cm and 2 mG, respectively, prior to the spectroscopic measurement enabled the recording of millimeter-wave spectra of Rydberg states with principal quantum number beyond n=100 under conditions where the inhomogeneous broadening by stray fields is minimal and no dephasing of the Rydberg-atom sample can be detected over measurement times up to 60 μs. The Fourier-transform-limited line widths of better than 20 kHz enabled the observation of the hyperfine structure of nS and nP Rydberg states of Cs beyond n=90. The analysis of the line shapes of transitions to Rydberg states with n≈230 indicated that field inhomogeneities across the atomic sample represent the dominant cause of spectral broadening at high n values. The analysis also revealed that the initial polarization of the atomic sample (F=4, MF=4) is preserved for several tens of microseconds, the depolarization being caused by slow precession along the magnetic stray fields.},
number = {3},
urldate = {2014-06-02},
journal = {Physical Review A},
author = {Saßmannshausen, H. and Merkt, F. and Deiglmayr, J.},
year = {2013},
keywords = {Ultracold Rydberg gases},
pages = {032519},
}
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