Coherent population trapping in Raman-pulse atom interferometry
Name
Butts-2011-Coherent population trapping in Raman-pulse atom interferometry.pdf
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Author(s)
Kinast, Joseph M.
Radojevic, Antonije M.
Timmons, Brian P.
Stoner, Richard E.
Butts, David L.
Kotru, Krish
Date Issued
October 2011
Journal
Physical Review A
Publisher
American Physical Society (APS)
Citation
Butts, David et al. “Coherent Population Trapping in Raman-pulse Atom Interferometry.” Physical Review A 84.4 (2011): n. pag. Web. 16 Feb. 2012. © 2011 American Physical Society
Version
Final published version
Abstract
Raman pulse atom interferometry is an important modality for precision measurements of inertial forces and tests of fundamental physics. Typical Raman atom optics use two coherent laser fields applied at gigahertz-scale detunings from optical resonance, so that spontaneous emission produces a minor or negligible source of decoherence. An additional consequence of spontaneous emission is coherent population trapping (CPT). We show that CPT produces coherences and population differences which induce systematic effects in Raman pulse atom interferometers. We do not believe that CPT has been previously identified as an error mechanism in Raman pulse atom interferometry. We present an experimental characterization of CPT coherences and population differences induced in laser-cooled cesium atoms by application of Raman pulses at detunings near 1 GHz, commensurate with detunings used in several precision measurement experiments. We are not aware of previous demonstrations of CPT-induced population difference. We argue that CPT effects could induce phase shifts of several milliradians in magnitude for typical experimental parameters and stipulate that these errors can be suppressed by propagation direction reversal in Raman interferometer-based precision measurements.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevA.84.043613
