Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.83.032110
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dc.titleHigh-efficiency tomographic reconstruction of quantum states by quantum nondemolition measurements
dc.contributor.authorHuang, J.S.
dc.contributor.authorWei, L.F.
dc.contributor.authorOh, C.H.
dc.date.accessioned2014-12-12T08:00:42Z
dc.date.available2014-12-12T08:00:42Z
dc.date.issued2011-03-14
dc.identifier.citationHuang, J.S., Wei, L.F., Oh, C.H. (2011-03-14). High-efficiency tomographic reconstruction of quantum states by quantum nondemolition measurements. Physical Review A - Atomic, Molecular, and Optical Physics 83 (3) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.83.032110
dc.identifier.issn10502947
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/117036
dc.description.abstractWe propose a high-efficiency scheme to tomographically reconstruct an unknown quantum state by using a series of quantum nondemolition (QND) measurements. The proposed QND measurements of the qubits are implemented by probing the stationary transmissions through a driven dispersively coupled resonator. It is shown that only one kind of QND measurement is sufficient to determine all the diagonal elements of the density matrix of the detected quantum state. The remaining nondiagonal elements can be similarly determined by transferring them to the diagonal locations after a series of unitary operations. Compared with the tomographic reconstructions based on the usual destructive projective measurements (wherein one such measurement can determine only one diagonal element of the density matrix), the present reconstructive approach exhibits significantly high efficiency. Specifically, our generic proposal is demonstrated by the experimental circuit quantum electrodynamics systems with a few Josephson charge qubits. © 2011 American Physical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1103/PhysRevA.83.032110
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentCENTRE FOR QUANTUM TECHNOLOGIES
dc.contributor.departmentPHYSICS
dc.description.doi10.1103/PhysRevA.83.032110
dc.description.sourcetitlePhysical Review A - Atomic, Molecular, and Optical Physics
dc.description.volume83
dc.description.issue3
dc.description.page-
dc.description.codenPLRAA
dc.identifier.isiut000288317300002
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