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Quantum stopwatch: how to store time in a quantum memory

Abstract:

Quantum mechanics imposes a fundamental trade-off between the accuracy of time measurements and the size of the systems used as clocks. When the measurements of different time intervals are combined, the errors due to the finite clock size accumulate, resulting in an overall inaccuracy that grows with the complexity of the set-up. Here, we introduce a method that, in principle, eludes the accumulation of errors by coherently transferring information from a quantum clock to a quantum memory of...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1098/rspa.2017.0773

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Computer Science
Oxford college:
St Hilda's College
Role:
Author
Canadian Institute for Advanced Research More from this funder
HKU Seed Funding for Basic Research More from this funder
John Templeton Foundation More from this funder
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Publisher:
Royal Society Publisher's website
Journal:
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Journal website
Volume:
474
Issue:
2213
Article number:
20170773
Publication date:
2018-05-23
Acceptance date:
2018-04-24
DOI:
EISSN:
1471-2946
ISSN:
1364-5021
Source identifiers:
853623
Keywords:
Pubs id:
pubs:853623
UUID:
uuid:7ed021a4-c351-4e73-b776-6c22a2caebd5
Local pid:
pubs:853623
Deposit date:
2018-05-23

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