Pauli blocking enhanced life-times and cooperative radiation in a 2D Fermi gas
ORAL
Abstract
The observation of Pauli blocking of atomic spontaneous decay via direct measurements of the atomic population requires the use of long-lived atomic gases where quantum statistics, atom recoil and cooperative radiative processes are all relevant. We develop a theoretical framework capable of simultaneously accounting for these effects and apply it to atoms featuring an effective $\Lambda$ level structure confined in a single 2D pancake or arrays of pancakes. We identify a parameter window in which a factor of two extension in the atomic lifetime clearly attributable to Pauli blocking should be experimentally observable in deeply degenerate gases with $\sim 10^{3} $ atoms. Consistent with these theory predictions, we experimentally observe a $\sim$20\% suppressed excited state decay rate in the moderately degenerate regime on the ${}^{1}\rm{S_0}-{}^{3}\rm{P_1}$ transition in $^{87}$Sr atoms.
Ref: arXiv:2108.02819
Ref: arXiv:2108.02819
*This work is supported by AFOSR Grant No. FA9550-18-1-0319 and its MURI Initiative, by the DARPA and ARO Grant No. W911NF-16-1-0576, the ARO single investigator Grant No. W911NF-19-1-0210, the NSF PHY1820885, NSF JILA-PFC PHY-1734006 Grants, NSF QLCI-2016244 grant, DOE-QSA and by NIST.
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Publication: arXiv:2108.02819
Presenters
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Thomas Bilitewski
- JILA
- University of Colorado, Boulder
- JILA, NIST and University of Colorado Boulder