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  Beating the classical precision limit with spin-1 Dicke states of more than 10,000 atoms

Zou, Y.-Q., Wu, L.-N., Liu, Q., Luo, X.-Y., Guo, S.-F., Cao, J.-H., et al. (2018). Beating the classical precision limit with spin-1 Dicke states of more than 10,000 atoms. Proceedings of the National Academy of Sciences of the United States of America, 115(25), 6381-6385. doi:10.1073/pnas.1715105115.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0001-EC82-2 Version Permalink: https://hdl.handle.net/21.11116/0000-0001-EDEB-C
Genre: Journal Article

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 Creators:
Zou, Yi-Quan1, Author
Wu, Ling-Na1, Author
Liu, Qi1, Author
Luo, Xin-Yu1, Author
Guo, Shuai-Feng1, Author
Cao, Jia-Hao1, Author
Tey, Meng Khoon1, Author
You, Li1, Author
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1external, ou_persistent22              

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 Abstract: Interferometry is a paradigm for most precision measurements. Using N uncorrelated particles, the achievable precision for a two-mode (two-path) interferometer is bounded by the standard quantum limit (SQL), 1/root N, due to the discrete (quanta) nature of individual measurements. Despite being a challenging benchmark, the two-mode SQL has been approached in a number of systems, including the Laser Inter-ferometer Gravitational-Wave Observatory and today's best atomic clocks. For multimode interferometry, the SQL becomes 1/[(M - 1)root N] using M modes. Higher precision can also be achieved using entangled particles such that quantum noises from individual particles cancel out. In this work, we demonstrate an interferometric precision of 2.42(-1.29)(+1.76) dB beyond the three-mode SQL, using balanced spin-1 (three-mode) Dicke states containing thousands of entangled atoms. The input quantum states are deterministically generated by controlled quantum phase transition and exhibit close to ideal quality. Our work shines light on the pursuit of quantum metrology beyond SQL.

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Language(s): eng - English
 Dates: 2018-06-192018-06-01
 Publication Status: Issued
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 Identifiers: ISI: 000435585200041
DOI: 10.1073/pnas.1715105115
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Title: Proceedings of the National Academy of Sciences of the United States of America
  Other : Proceedings of the National Academy of Sciences of the USA
  Other : Proc. Acad. Sci. USA
  Other : Proc. Acad. Sci. U.S.A.
  Abbreviation : PNAS
Source Genre: Journal
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Publ. Info: Washington, D.C. : National Academy of Sciences
Pages: - Volume / Issue: 115 (25) Sequence Number: - Start / End Page: 6381 - 6385 Identifier: ISSN: 0027-8424
CoNE: https://pure.mpg.de/cone/journals/resource/954925427230