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Precision atomic gravimeter based on Bragg diffraction

Altin, Paul; Johnsson, Mattias; Negnevitsky, V; Dennis, Graham; Anderson, R P; Debs, John; Szigeti, Stuart; Bennetts, Shayne; McDonald, Gordon; Close, John; Robins, Nicholas

Description

We present a precision gravimeter based on coherent Bragg diffraction of freely falling cold atoms. Traditionally, atomic gravimeters have used stimulated Raman transitions to separate clouds in momentum space by driving transitions between two internal atomic states. Bragg interferometers utilize only a single internal state, and can therefore be less susceptible to environmental perturbations. Here we show that atoms extracted from a magneto-optical trap using an accelerating optical lattice...[Show more]

dc.contributor.authorAltin, Paul
dc.contributor.authorJohnsson, Mattias
dc.contributor.authorNegnevitsky, V
dc.contributor.authorDennis, Graham
dc.contributor.authorAnderson, R P
dc.contributor.authorDebs, John
dc.contributor.authorSzigeti, Stuart
dc.contributor.authorBennetts, Shayne
dc.contributor.authorMcDonald, Gordon
dc.contributor.authorClose, John
dc.contributor.authorRobins, Nicholas
dc.date.accessioned2015-12-13T22:17:06Z
dc.identifier.issn1367-2630
dc.identifier.urihttp://hdl.handle.net/1885/70994
dc.description.abstractWe present a precision gravimeter based on coherent Bragg diffraction of freely falling cold atoms. Traditionally, atomic gravimeters have used stimulated Raman transitions to separate clouds in momentum space by driving transitions between two internal atomic states. Bragg interferometers utilize only a single internal state, and can therefore be less susceptible to environmental perturbations. Here we show that atoms extracted from a magneto-optical trap using an accelerating optical lattice are a suitable source for a Bragg atom interferometer, allowing efficient beamsplitting and subsequent separation of momentum states for detection. Despite the inherently multi-state nature of atom diffraction, we are able to build a Mach-Zehnder interferometer using Bragg scattering which achieves a sensitivity to the gravitational acceleration of Δg/g = 2.7 × 10-9 with an integration time of 1000 s. The device can also be converted to a gravity gradiometer by a simple modification of the light pulse sequence.
dc.publisherInstitute of Physics Publishing
dc.rightsAuthor/s retain copyright
dc.sourceNew Journal of Physics
dc.subjectKeywords: Atom diffraction; Atom interferometer; Atomic state; Bragg diffraction; Bragg scattering; Cold atoms; Environmental perturbations; Gravitational accelerations; Gravity gradiometer; Integration time; Internal state; Light-pulse sequence; Magnetooptical tra
dc.titlePrecision atomic gravimeter based on Bragg diffraction
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume15
dc.date.issued2013
local.identifier.absfor020601 - Degenerate Quantum Gases and Atom Optics
local.identifier.ariespublicationf5625xPUB2505
local.type.statusPublished Version
local.contributor.affiliationAltin, Paul, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationJohnsson, Mattias, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationNegnevitsky, V, Monash University
local.contributor.affiliationDennis, Graham, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationAnderson, R P, Monash University
local.contributor.affiliationDebs, John, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationSzigeti, Stuart, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationBennetts, Shayne, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationMcDonald, Gordon, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationClose, John, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationRobins, Nicholas, College of Physical and Mathematical Sciences, ANU
local.identifier.doi10.1088/1367-2630/15/2/023009
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-02-24T08:59:26Z
local.identifier.scopusID2-s2.0-84874507784
local.identifier.thomsonID000314517100001
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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