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  Unconditional steady-state entanglement in macroscopic hybrid systems by coherent noise cancellation

Huang, X., Zeuthen, E., Vasilyev, D. V., He, Q., Hammerer, K., & Polzik, E. S. (2018). Unconditional steady-state entanglement in macroscopic hybrid systems by coherent noise cancellation. Physical Review Letters, 121: 103602. doi:10.1103/PhysRevLett.121.103602.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-4C74-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-ED67-0
Genre: Journal Article

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 Creators:
Huang, Xinyao, Author
Zeuthen, Emil, Author
Vasilyev, Denis V., Author
He, Qiongyi, Author
Hammerer, Klemens1, Author              
Polzik, Eugene S., Author
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Quantum Physics, quant-ph
 Abstract: The generation of entanglement between disparate physical objects is a key ingredient in the field of quantum technologies, since they can have different functionalities in a quantum network. Here we propose and analyze a generic approach to steady-state entanglement generation between two oscillators with different temperatures and decoherence properties coupled in cascade to a common unidirectional light field. The scheme is based on a combination of coherent noise cancellation and dynamical cooling techniques for two oscillators with effective masses of opposite signs, such as quasi-spin and motional degrees of freedom, respectively. The interference effect provided by the cascaded setup can be tuned to implement additional noise cancellation leading to improved entanglement even in the presence of a hot thermal environment. The unconditional entanglement generation is advantageous since it provides a ready-to-use quantum resource. Remarkably, by comparing to the conditional entanglement achievable in the dynamically stable regime, we find our unconditional scheme to deliver a virtually identical performance when operated optimally.

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 Dates: 2018-01-082018-09-182018
 Publication Status: Published in print
 Pages: Final version; 6 pages, 3 figures + Supplemental Material
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1801.02569
DOI: 10.1103/PhysRevLett.121.103602
URI: http://arxiv.org/abs/1801.02569
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 121 Sequence Number: 103602 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1