Spin Gradient Thermometry for Ultracold Atoms in Optical Lattices
Name
Weld-2009-Spin Gradient Thermometry for Ultracold Atoms in Optical Lattices.pdf
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Author(s)
Weld, David M.
Medley, Patrick M.
Miyake, Hirokazu
Hucul, David
Pritchard, David E.
Ketterle, Wolfgang
Date Issued
December 2009
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Weld, David M. et al. “Spin Gradient Thermometry for Ultracold Atoms in Optical Lattices.” Physical Review Letters 103.24 (2009): 245301. © 2009 The American Physical Society
Version
Final published version
Abstract
We demonstrate spin gradient thermometry, a new general method of measuring the temperature of ultracold atoms in optical lattices. We realize a mixture of spins separated by a magnetic field gradient. Measurement of the width of the transition layer between the two spin domains serves as a new method of thermometry which is observed to work over a broad range of lattice depths and temperatures, including in the Mott insulator regime. We demonstrate the thermometry using ultracold rubidium atoms, and suggest that interesting spin physics can be realized in this system. The lowest measured temperature is 1 nK, indicating that the system has reached the quantum regime, where insulating shells are separated by superfluid layers.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.103.245301
