Quantum process estimation via generic two-body correlations
Name
Mohseni-2010-Quantum process esti.pdf
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Author(s)
Mohseni, Masoud
Masoud, A. T.
Barreiro, Julio T.
Kwiat, P. G.
Aspuru-Guzik, Alan
Date Issued
June 2009
Journal
Physical Review A
Publisher
American Physical Society
Citation
Mohseni, M., Rezakhani, A. T., Barreiro, J. T., Kwiat, P. G., and Aspuru-Guzik, A. (2010). Quantum process estimation via generic two-body correlations. Phys. Rev. A. 81: 032102/1-7. © 2010 The American Physical Society
Version
Final published version
Abstract
Performance of quantum process estimation is naturally limited by fundamental, random, and systematic imperfections of preparations and measurements. These imperfections may lead to considerable errors in the process reconstruction because standard data-analysis techniques usually presume ideal devices. Here, by utilizing generic auxiliary quantum or classical correlations, we provide a framework for the estimation of quantum dynamics via a single measurement apparatus. By construction, this approach can be applied to quantum tomography schemes with calibrated faulty-state generators and analyzers. Specifically, we present a generalization of the work begun by M. Mohseni and D. A. Lidar [Phys. Rev. Lett. 97, 170501 (2006)] with an imperfect Bell-state analyzer. We demonstrate that for several physically relevant noisy preparations and measurements, classical correlations and a small data-processing overhead suffice to accomplish the full system identification. Furthermore, we provide the optimal input states whereby the error amplification due to inversion of the measurement data is minimal.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevA.81.032102
