Engineering Quantum States of Matter for Atomic Clocks in Shallow Optical Lattices.

Published on Sep 17, 2019in Physical Review Letters9.161
· DOI :10.1103/PHYSREVLETT.123.123401
Ross B. Hutson10
Estimated H-index: 10
 (CU: University of Colorado Boulder), Akihisa Goban17
Estimated H-index: 17
 (CU: University of Colorado Boulder)+ 3 AuthorsJun Ye126
Estimated H-index: 126
 (CU: University of Colorado Boulder)
Sources
Abstract
We investigate the effects of stimulated scattering of optical lattice photons on atomic coherence times in a state-of-the art {}^{87}\mathrm{Sr}optical lattice clock. Such scattering processes are found to limit the achievable coherence times to less than 10 s, significantly shorter than the predicted 145(40) s lifetime of {}^{87}\mathrm{Sr}s excited clock state. We suggest that shallow, state-independent optical lattices with increased lattice constants can give rise to sufficiently small lattice photon scattering and motional dephasing rates as to enable coherence times on the order of the clock transition's natural lifetime. Not only should this scheme be compatible with the relatively high atomic density associated with Fermi-degenerate gases in three-dimensional optical lattices, but we anticipate that certain properties of various quantum states of matter can be used to suppress dephasing due to tunneling.
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