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  Adiabatic Elimination of Gaussian Subsystems from Quantum Dynamics under Continuous Measurement

Cernotik, O., Vasilyev, D. V., & Hammerer, K. (2015). Adiabatic Elimination of Gaussian Subsystems from Quantum Dynamics under Continuous Measurement. Physical Review A, 92: 012124. doi:10.1103/PhysRevA.92.012124.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-9FFD-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-5A08-9
Genre: Journal Article

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 Creators:
Cernotik, Ondřej, Author
Vasilyev, Denis V., Author
Hammerer, Klemens1, 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, Condensed Matter, Mesoscale and Nanoscale Physics, cond-mat.mes-hall
 Abstract: An ever broader range of physical platforms provides the possibility to study and engineer quantum dynamics under continuous measurements. In many experimental arrangements the system of interest is monitored by means of an ancillary device, whose sole purpose is to transduce the signal from the system to the measurement apparatus. Here, we present a method of adiabatic elimination when the transducer consists of an arbitrary number of bosonic modes with Gaussian dynamics while the measured object can be any quantum system. Crucially, our approach can cope with the highly relevant case of finite temperature of the transducer, which is not easily achieved with other methods. We show that this approach provides a significant improvement in the readout of superconducting qubits in circuit QED already for a few thermal excitations, and admits to adiabatically eliminate optomechanical transducers.

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 Dates: 2015-03-252015
 Publication Status: Published in print
 Pages: 13 pages + Appendix, 8 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1503.07484
DOI: 10.1103/PhysRevA.92.012124
 Degree: -

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Title: Physical Review A
  Other : Phys. Rev. A
  Other : Physical Review A: Atomic, Molecular, and Optical Physics
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 92 Sequence Number: 012124 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: /journals/resource/954925225012_2