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Blue-detuned magneto-optical trap

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Title: Blue-detuned magneto-optical trap
Authors: Jarvis, KN
Devlin, JA
Wall, TE
Sauer, BE
Tarbutt, MR
Item Type: Journal Article
Abstract: We present the properties and advantages of a new magneto-optical trap (MOT) where blue- detuned light drives ‘type-II’ transitions that have dark ground states. Using ⁸⁷Rb, we reach a radiation-pressure-limited density exceeding 10¹¹ cm⁻³ and a temperature below 30 μK. The phase-space density is higher than in normal atomic MOTs, and a million times higher than comparable red-detuned type-II MOTs, making the blue-detuned MOT particularly attractive for molecular MOTs which rely on type-II transitions. The loss of atoms from the trap is dominated by ultracold collisions between Rb atoms. For typical trapping conditions, we measure a loss rate of 1.8(4) × 10⁻¹⁰ cm³ s⁻¹.
Issue Date: 20-Feb-2018
Date of Acceptance: 2-Jan-2018
URI: http://hdl.handle.net/10044/1/55644
DOI: https://dx.doi.org/10.1103/PhysRevLett.120.083201
ISSN: 0031-9007
Publisher: American Physical Society
Journal / Book Title: Physical Review Letters
Volume: 120
Copyright Statement: © 2018 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article ’ s title, journal citation, and DOI.
Sponsor/Funder: Engineering & Physical Science Research Council (E
Engineering and Physical Sciences Research Council
Funder's Grant Number: RF040529
EP/M027716/1
Keywords: Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
LOSS COLLISIONS
NEUTRAL ATOMS
OPTICAL TRAP
SODIUM ATOMS
COLD ATOMS
BEHAVIOR
LIGHT
DEPENDENCE
PRESSURE
LIMIT
02 Physical Sciences
General Physics
Publication Status: Published
Article Number: 083201
Appears in Collections:Quantum Optics and Laser Science
Physics
Faculty of Natural Sciences



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