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  Thermometry of ultracold atoms via nonequilibrium work distributions

Johnson, T. H., Cosco, F., Mitchison, M. T., Jaksch, D., & Clark, S. R. (2016). Thermometry of ultracold atoms via nonequilibrium work distributions. Physical Review A, 93(5): 053619. doi:10.1103/PhysRevA.93.053619.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-2D24-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-90BF-2
Genre: Journal Article

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http://dx.doi.org/10.1103/PhysRevA.93.053619 (Publisher version)
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https://arxiv.org/abs/1508.02992 (Preprint)
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 Creators:
Johnson, T. H.1, 2, 3, Author
Cosco, F.2, 4, 5, Author
Mitchison, M. T.2, 6, Author
Jaksch, D.1, 2, 3, Author
Clark, Stephen R.2, 3, 7, 8, Author              
Affiliations:
1Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, 117543 Singapore, ou_persistent22              
2Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom, ou_persistent22              
3Keble College, University of Oxford, Parks Road, Oxford OX1 3PG, United Kingdom, ou_persistent22              
4Turku Centre for Quantum Physics, Department of Physics and Astronomy, University of Turku, FI-20014 Turun yliopisto, Finland, ou_persistent22              
5Dip. Fisica, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy, ou_persistent22              
6Quantum Optics and Laser Science Group, Blackett Laboratory, Imperial College London, London SW7 2BW, United Kingdom, ou_persistent22              
7Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom, ou_persistent22              
8Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              

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Free keywords: Quantum Gases; Statistical Mechanics
 Abstract: Estimating the temperature of a cold quantum system is difficult. Usually one measures a well-understood thermal state and uses that prior knowledge to infer its temperature. In contrast, we introduce a method of thermometry that assumes minimal knowledge of the state of a system and is potentially nondestructive. Our method uses a universal temperature dependence of the quench dynamics of an initially thermal system coupled to a qubit probe that follows from the Tasaki-Crooks theorem for nonequilibrium work distributions. We provide examples for a cold-atom system, in which our thermometry protocol may retain accuracy and precision at subnano-Kelvin temperatures.

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Language(s): eng - English
 Dates: 2015-09-212016-05-23
 Publication Status: Published online
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevA.93.053619
arXiv: 1508.02992
 Degree: -

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Title: Physical Review A
  Other : Phys. Rev. A
  Other : Physical Review A: Atomic, Molecular, and Optical Physics
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 93 (5) Sequence Number: 053619 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: /journals/resource/954925225012_2