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  Achieving ground state and enhancing entanglement by recovering information

Miao, H., Danilishin, S., Müller-Ebhardt, H., & Chen, Y. (2010). Achieving ground state and enhancing entanglement by recovering information. New Journal of Physics, 12(8): 083032. doi:10.1088/1367-2630/12/8/083032.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-BB83-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-BB86-2
Genre: Journal Article

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1003.4048 (Preprint), 457KB
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 Creators:
Miao, Haixing, Author
Danilishin, Stefan, Author
Müller-Ebhardt, Helge1, Author              
Chen, Yanbei2, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              
2Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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Free keywords: Quantum Physics, quant-ph
 Abstract: For cavity-assisted optomechanical cooling experiments, it has been shown in the literature that the cavity bandwidth needs to be smaller than the mechanical frequency in order to achieve the quantum ground state of the mechanical oscillator, which is the so-called resolved-sideband or good-cavity limit. We provide a new but physically equivalent insight into the origin of such a limit: that is information loss due to a finite cavity bandwidth. With an optimal feedback control to recover those information, we can surpass the resolved-sideband limit and achieve the quantum ground state. Interestingly, recovering those information can also significantly enhance the optomechanical entanglement. Especially when the environmental temperature is high, the entanglement will either exist or vanish critically depending on whether information is recovered or not, which is a vivid example of a quantum eraser.

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 Dates: 2010-03-212010
 Publication Status: Published in print
 Pages: 9 figures, 18 pages
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1003.4048
DOI: 10.1088/1367-2630/12/8/083032
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Title: New Journal of Physics
  Other : New J. Phys.
Source Genre: Journal
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Publ. Info: Bristol, UK : Institute of Physics Pub.
Pages: - Volume / Issue: 12 (8) Sequence Number: 083032 Start / End Page: - Identifier: ISSN: 1367-2630
CoNE: https://pure.mpg.de/cone/journals/resource/954926913666