Data associated with the publication: "The fundamental linewidth limit of electromagnetically induced transparency in a thermal Rydberg ladder system"
Spectroscopy of Rydberg states has become a popular platform for quantum sensing, with the most
common readout scheme being two-photon electromagnetically induced transparency (EIT) using
counter-propagating laser beams. The resolution with which we can measure energy of the Rydberg
state is set by the spectral linewidth of the EIT feature. While selection criteria for the two-photon
resonance can narrow the linewidth to the order of the Rydberg state decay rate for a single atom,
the Doppler shift from thermal velocity of the atoms broadens the linewidth of the ensemble to of
order the decay rate of the intermediate state. Here, we derive an analytic expression for the Doppler
residual lineshape in the low-power limit, and corroborate the results with experiment. For Rb, we
find the full-width at half-maximum linewidth limit to be 1.84 MHz when scanning the coupling laser
and measure an experimental linewidth of 2.04 MHz. These linewidths are significantly narrower
than previous theoretical estimates as well as previously reported measured linewidths. With this
we demonstrate the most precise energy resolution of a Rydberg state in thermal vapor using two
photons to date. We then map out misalignment and power broadening near this limit and discuss
broadening mechanisms.
About this Dataset
| Title | Data associated with: "Fundamental linewidth limit of electromagnetically induced transparency in a thermal Rydberg ladder" |
|---|---|
| Description | Data associated with the publication: "The fundamental linewidth limit of electromagnetically induced transparency in a thermal Rydberg ladder system" Spectroscopy of Rydberg states has become a popular platform for quantum sensing, with the most common readout scheme being two-photon electromagnetically induced transparency (EIT) using counter-propagating laser beams. The resolution with which we can measure energy of the Rydberg state is set by the spectral linewidth of the EIT feature. While selection criteria for the two-photon resonance can narrow the linewidth to the order of the Rydberg state decay rate for a single atom, the Doppler shift from thermal velocity of the atoms broadens the linewidth of the ensemble to of order the decay rate of the intermediate state. Here, we derive an analytic expression for the Doppler residual lineshape in the low-power limit, and corroborate the results with experiment. For Rb, we find the full-width at half-maximum linewidth limit to be 1.84 MHz when scanning the coupling laser and measure an experimental linewidth of 2.04 MHz. These linewidths are significantly narrower than previous theoretical estimates as well as previously reported measured linewidths. With this we demonstrate the most precise energy resolution of a Rydberg state in thermal vapor using two photons to date. We then map out misalignment and power broadening near this limit and discuss broadening mechanisms. |
| Modified | 2026-02-24 00:00:00 |
| Publisher Name | National Institute of Standards and Technology |
| Contact | mailto:[email protected] |
| Keywords | Rydberg atoms , atomic physics , receivers , fields strength , electric field , volts/meter |
{
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"fn": "Noah Schlossberger"
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"title": "Data associated with: \"Fundamental linewidth limit of electromagnetically induced transparency in a\nthermal Rydberg ladder\"",
"description": "Data associated with the publication: \"The fundamental linewidth limit of electromagnetically induced transparency in a thermal Rydberg ladder system\"\n\nSpectroscopy of Rydberg states has become a popular platform for quantum sensing, with the most\ncommon readout scheme being two-photon electromagnetically induced transparency (EIT) using\ncounter-propagating laser beams. The resolution with which we can measure energy of the Rydberg\nstate is set by the spectral linewidth of the EIT feature. While selection criteria for the two-photon\nresonance can narrow the linewidth to the order of the Rydberg state decay rate for a single atom,\nthe Doppler shift from thermal velocity of the atoms broadens the linewidth of the ensemble to of\norder the decay rate of the intermediate state. Here, we derive an analytic expression for the Doppler\nresidual lineshape in the low-power limit, and corroborate the results with experiment. For Rb, we\nfind the full-width at half-maximum linewidth limit to be 1.84 MHz when scanning the coupling laser\nand measure an experimental linewidth of 2.04 MHz. These linewidths are significantly narrower\nthan previous theoretical estimates as well as previously reported measured linewidths. With this\nwe demonstrate the most precise energy resolution of a Rydberg state in thermal vapor using two\nphotons to date. We then map out misalignment and power broadening near this limit and discuss\nbroadening mechanisms.",
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