DOI: 10.5281/zenodo.16949620
title: Dataset for "Atomic thermometry in optical lattice clocks"

description: Experimental dataset supporting the study “Atomic thermometry in optical lattice clocks” (arXiv:2508.08164). It includes temperature measurements of ultracold Yb atoms in the optical lattice clock IT-Yb1, obtained via sideband and Doppler spectroscopy under varying lattice depths. The dataset includes atoms cooled to a few μK using Sisyphus cooling techniques. Temperatures are extracted using both the harmonic oscillator and Born–Oppenheimer models. The corresponding lattice light shifts for each temperature model are calculated and compared.

The Python code used for data analysis and simulations is available on github.

The folders Sideband_D_NoSis, Sideband_D_Sis, and Sideband_Tcool contain sideband spectra obtained without Sisyphus cooling, with 50 ms of Sisyphus cooling, and with variable Sisyphus cooling time, respectively. In particular:In the Sideband_D_NoSis folder, files 063–070 were taken with different lattice powers.In the Sideband_D_Sis folder, files 071–078 were taken with different lattice powers.

In the Sideband_Tcool folder, files 036, 041-049 were taken with different Sysiphus cooling time, i.e., 0 ms, 1ms, 2ms, 5ms, 10ms, 20ms, 50ms, 100ms, 200ms and 500ms.

The folders Doppler_NoSis, Doppler_Sis, and Doppler_Tcool contain Doppler spectra obtained without Sisyphus cooling, with 50 ms of Sisyphus cooling, and with variable Sisyphus cooling time, respectively. In particular:In the Doppler_NoSis folder, files 079-086 were taken with different lattice powers.In the Doppler_Sis folder, files  087-094 were taken with different lattice powers.

In the Doppler_Tcool folder, files 052-062 were taken with different Sysiphus cooling time, i.e., 0 ms, 1ms, 2ms, 5ms, 10ms, 20ms, 50ms, 100ms, 200ms, 500ms and 1000ms.




File
Description


TemperatureVsD_BO_NoSis.txt
Results in terms of lattice depth (D) and radial and longitudinal temperatures (Tr and Tz), obtained by applying the Born-Oppenheimer model to data in the folder Sideband_D_NoSis.


TemperatureVsD_HO_NoSis.txt
Results in terms of lattice depth (D) and radial and longitudinal temperatures (Tr and Tz), obtained by applying the harmonic oscillator model to data in the folder Sideband_D_NoSis.


TemperatureVsD_Doppler_NoSis.txt
Results in terms of lattice depth (D) and radial and radial temperature (Tr) obtained by applying the Doppler model to data in the folder Doppler_NoSis.


TemperatureVsD_BO_Sis.txt
Results in terms of lattice depth (D) and radial and longitudinal temperatures (Tr and Tz), obtained by applying the Born-Oppenheimer model to data in the folder Sideband_D_Sis.


TemperatureVsD_HO_Sis.txt
Results in terms of lattice depth (D) and radial and longitudinal temperatures (Tr and Tz), obtained by applying the harmonic oscillator model to data in the folder Sideband_D_Sis.


TemperatureVsD_Doppler_Sis.txt
Results in terms of lattice depth (D) and radial and radial temperature (Tr) obtained by applying the Doppler model to data in the folder Doppler_Sis.


TemperatureVsTcool_BO.txt
Results in terms of lattice depth (D) and radial and longitudinal temperatures (Tr and Tz), obtained by applying the Born-Oppenheimer model to data in the folder Sideband_Tcool.


TemperatureVsTcool_HO.txt
Results in terms of lattice depth (D) and radial and longitudinal temperatures (Tr and Tz), obtained by applying the harmonic oscillator model to data in the folder Sideband_D_Tcool.


TemperatureVsTcool_Doppler.txt
Results in terms of lattice depth (D) and radial and radial temperature (Tr) obtained by applying the Doppler model to data in the folder Doppler_Tcool.


BlueSideband_nz.dat
Sideband spectroscopy in a non-usual configuration to resolve spectral features corresponding to transitions from different longitudinal vibrational states nz


LatticeShift_NoSis.dat
Difference in lattice shift obtained using different models for sideband spectrum analysis and shift calculation, based on data from the Sideband_D_NoSis and Doppler_NoSis folders


LatticeShift_Sis.dat
Difference in lattice shift obtained using different models for sideband spectrum analysis and shift calculation, based on data from the Sideband_D_Sis and Doppler_Sis folders


LatticeShift_Tcool.dat
Difference in lattice shift obtained using different models for sideband spectrum analysis and shift calculation, based on data from the Sideband_Tcool and Doppler_Tcool folders
description: This work was carried out in the project 22IEM01 TOCK. This project has received funding from the European Partnership on Metrology, co-financed from the European Union’s Horizon Europe Research and Innovation Programme and by the Participating States.

This work was supported by the Cascading Grant Spoke 3 under the PNRR MUR project PE0000023-NQSTI, funded by the European Union – Next Generation EU.