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Thermometry of ultracold atoms via nonequilibrium work distributions

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 non...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted Manuscript

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Publisher copy:
10.1103/PhysRevA.93.053619

Authors


Johnson, TH More by this author
Mitchison, MT More by this author
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Department:
Keble College
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Department:
Oxford, MPLS, Physics
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Grant:
Programme on Bio-Inspired Quantum Technologies
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review A Journal website
Volume:
93
Issue:
5
Pages:
Article: 053619
Publication date:
2016-05-23
DOI:
EISSN:
2469-9934
ISSN:
2469-9926
Pubs id:
pubs:666872
URN:
uri:4cfa6eef-eda7-49fe-bdee-6161d8754273
UUID:
uuid:4cfa6eef-eda7-49fe-bdee-6161d8754273
Local pid:
pubs:666872

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