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Heisenberg-scaling ...
Heisenberg-scaling measurement of the single-photon Kerr non-linearity using mixed states
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Chen, Geng (author)
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Aharon, Nati (author)
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Sun, Yong-Nan (author)
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Zhang, Zi-Huai (author)
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Zhang, Wen-Hao (author)
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He, De-Yong (author)
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Tang, Jian-Shun (author)
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Xu, Xiao-Ye (author)
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- Kedem, Yaron (author)
- Stockholms universitet,Fysikum
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Li, Chuan-Feng (author)
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Guo, Guang-Can (author)
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(creator_code:org_t)
- 2018-01-08
- 2018
- English.
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In: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 9
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https://doi.org/10.1...
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https://www.nature.c...
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https://urn.kb.se/re...
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Abstract
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- Improving the precision of measurements is a significant scientific challenge. Previous works suggest that in a photon-coupling scenario the quantum fisher information shows a quantum-enhanced scaling of N-2, which in theory allows a better-than-classical scaling in practical measurements. In this work, utilizing mixed states with a large uncertainty and a post-selection of an additional pure system, we present a scheme to extract this amount of quantum fisher information and experimentally attain a practical Heisenberg scaling. We performed a measurement of a single-photon's Kerr non-linearity with a Heisenberg scaling, where an ultra-small Kerr phase of. 6 x 10(-8) rad was observed with a precision of similar or equal to 3.6 x 10(-10) rad. From the use of mixed states, the upper bound of quantum fisher information is improved to 2N(2). Moreover, by using an imaginary weak-value the scheme is robust to noise originating from the self-phase modulation.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Quantum metrology
- Quantum optics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Chen, Geng
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Aharon, Nati
-
Sun, Yong-Nan
-
Zhang, Zi-Huai
-
Zhang, Wen-Hao
-
He, De-Yong
-
show more...
-
Tang, Jian-Shun
-
Xu, Xiao-Ye
-
Kedem, Yaron
-
Li, Chuan-Feng
-
Guo, Guang-Can
-
show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Nature Communica ...
- By the university
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Stockholm University