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Composite pulses for interferometry in a thermal cold atom cloud

Alexander Dunning, Rachel Gregory, James Bateman Orcid Logo, Nathan Cooper, Matthew Himsworth, Jonathan A. Jones, Tim Freegarde

Physical Review A, Volume: 90, Issue: 3

Swansea University Author: James Bateman Orcid Logo

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DOI (Published version): 10.1103/PhysRevA.90.033608

Abstract

Atom interferometric sensors and quantum information processors must maintain coherence while the evolving quantum wavefunction is split, transformed and recombined, but suffer from experimental inhomogeneities and uncertainties in the speeds and paths of these operations. Several error-correction t...

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Published in: Physical Review A
Published: 2014
URI: https://cronfa.swan.ac.uk/Record/cronfa28706
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first_indexed 2016-06-06T18:26:29Z
last_indexed 2018-02-09T05:13:06Z
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spelling 2017-05-30T16:35:11.8316717 v2 28706 2016-06-06 Composite pulses for interferometry in a thermal cold atom cloud 3b46126aa511514414c6c42c9c6f0654 0000-0003-4885-2539 James Bateman James Bateman true false 2016-06-06 SPH Atom interferometric sensors and quantum information processors must maintain coherence while the evolving quantum wavefunction is split, transformed and recombined, but suffer from experimental inhomogeneities and uncertainties in the speeds and paths of these operations. Several error-correction techniques have been proposed to isolate the variable of interest. Here we apply composite pulse methods to velocity-sensitive Raman state manipulation in a freely-expanding thermal atom cloud. We compare several established pulse sequences, and follow the state evolution within them. The agreement between measurements and simple predictions shows the underlying coherence of the atom ensemble, and the inversion infidelity in an 80 micro-Kelvin atom cloud is halved. Composite pulse techniques, especially if tailored for atom interferometric applications, should allow greater interferometer areas, larger atomic samples and longer interaction times, and hence improve the sensitivity of quantum technologies from inertial sensing and clocks to quantum information processors and tests of fundamental physics. Journal Article Physical Review A 90 3 8 9 2014 2014-09-08 10.1103/PhysRevA.90.033608 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2017-05-30T16:35:11.8316717 2016-06-06T13:00:32.8689278 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Alexander Dunning 1 Rachel Gregory 2 James Bateman 0000-0003-4885-2539 3 Nathan Cooper 4 Matthew Himsworth 5 Jonathan A. Jones 6 Tim Freegarde 7
title Composite pulses for interferometry in a thermal cold atom cloud
spellingShingle Composite pulses for interferometry in a thermal cold atom cloud
James Bateman
title_short Composite pulses for interferometry in a thermal cold atom cloud
title_full Composite pulses for interferometry in a thermal cold atom cloud
title_fullStr Composite pulses for interferometry in a thermal cold atom cloud
title_full_unstemmed Composite pulses for interferometry in a thermal cold atom cloud
title_sort Composite pulses for interferometry in a thermal cold atom cloud
author_id_str_mv 3b46126aa511514414c6c42c9c6f0654
author_id_fullname_str_mv 3b46126aa511514414c6c42c9c6f0654_***_James Bateman
author James Bateman
author2 Alexander Dunning
Rachel Gregory
James Bateman
Nathan Cooper
Matthew Himsworth
Jonathan A. Jones
Tim Freegarde
format Journal article
container_title Physical Review A
container_volume 90
container_issue 3
publishDate 2014
institution Swansea University
doi_str_mv 10.1103/PhysRevA.90.033608
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 0
active_str 0
description Atom interferometric sensors and quantum information processors must maintain coherence while the evolving quantum wavefunction is split, transformed and recombined, but suffer from experimental inhomogeneities and uncertainties in the speeds and paths of these operations. Several error-correction techniques have been proposed to isolate the variable of interest. Here we apply composite pulse methods to velocity-sensitive Raman state manipulation in a freely-expanding thermal atom cloud. We compare several established pulse sequences, and follow the state evolution within them. The agreement between measurements and simple predictions shows the underlying coherence of the atom ensemble, and the inversion infidelity in an 80 micro-Kelvin atom cloud is halved. Composite pulse techniques, especially if tailored for atom interferometric applications, should allow greater interferometer areas, larger atomic samples and longer interaction times, and hence improve the sensitivity of quantum technologies from inertial sensing and clocks to quantum information processors and tests of fundamental physics.
published_date 2014-09-08T03:34:59Z
_version_ 1763751493024874496
score 11.016235

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