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Detecting metrologically useful asymmetry and entanglement by a few local measurements

Abstract:

Important properties of a quantum system are not directly measurable, but they can be disclosed by how fast the system changes under controlled perturbations. In particular, asymmetry and entanglement can be verified by reconstructing the state of a quantum system. Yet, this usually requires experimental and computational resources which increase exponentially with the system size. Here we show how to detect metrologically useful asymmetry and entanglement by a limited number of measurements....

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/physreva.96.042327

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Sub department:
Atomic & Laser Physics
Role:
Author
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Publisher:
American Physical Society Publisher's website
Journal:
Physical Review A Journal website
Volume:
96
Issue:
4
Article number:
042327
Publication date:
2017-10-19
Acceptance date:
2017-10-19
DOI:
EISSN:
2469-9934
ISSN:
2469-9926
Source identifiers:
657578
Language:
English
Keywords:
Pubs id:
pubs:657578
UUID:
uuid:503ce0b7-dc0c-4dbb-aba4-947c6b7352b9
Local pid:
pubs:657578
Deposit date:
2019-10-21

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