Quantum phase magnification

Quantum phase magnification

Quantum metrology exploits entangled states of particles to improve sensing precision beyond the limit achievable with uncorrelated particles. All previous methods required detection noise levels below this standard quantum limit to realize the benefits of the intrinsic sensitivity provided by these...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) Vol. 352; no. 6293; pp. 1552 - 1555
Main Authors: Hosten, O., Krishnakumar, R., Engelsen, N. J., Kasevich, M. A.
Format: Journal Article
Language:English
Published: United States American Association for the Advancement of Science 24-06-2016
The American Association for the Advancement of Science
Subjects:
Coherence
Decibels
Detection
Devices
Metrology
Noise levels
Optics
Quantum physics
Rubidium
Sensors
Online Access:Get full text
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Summary:Quantum metrology exploits entangled states of particles to improve sensing precision beyond the limit achievable with uncorrelated particles. All previous methods required detection noise levels below this standard quantum limit to realize the benefits of the intrinsic sensitivity provided by these states. We experimentally demonstrate a widely applicable method for entanglement-enhanced measurements without low-noise detection. The method involves an intermediate quantum phase magnification step that eases implementation complexity. We used it to perform squeezed-state metrology 8 decibels below the standard quantum limit with a detection system that has a noise floor 10 decibels above the standard quantum limit.
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ISSN:0036-8075
1095-9203
DOI:10.1126/science.aaf3397