View in EDS PDF Full Text

Quantum Back-Action of an Individual Variable-Strength Measurement.

Saved in:
Bibliographic Details
Title: Quantum Back-Action of an Individual Variable-Strength Measurement.
Authors: Hatridge, M., Shankar, S., Mirrahimi, M., Schackert, F., Geerlings, K., Brecht, T., Sliwa, K. M., Frunzio, B. Abdo L., Girvin, S. M., Schoelkopf, R. J., Devoret, M. H.
Source: Science (pre-March 2025). 1/11/2013, Vol. 339 Issue 6116, p178-181. 4p.
Subjects: Quantum theory, Measurement, Superconductors, Qubits, Microwaves, Stochastic processes, Quadrature domains, Mathematical models
Abstract: Measuring a quantum system can randomly perturb its state. The strength and nature of this back-action depend on the quantity that is measured. In a partial measurement performed by an idea[ apparatus, quantum physics predicts that the system remains in a pure state whose evolution can be tracked perfectly from the measurement record. We demonstrated this property using a superconducting qubit dispersively coupled to a cavity traversed by a microwave signal. The back-action on the qubit state of a single measurement of both signal quadratures was observed and shown to produce a stochastic operation whose action is determined by the measurement result. This accurate monitoring of a qubit state is an essential prerequisite for measurement-based feedback control of quantum systems. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
FullText Links:
  – Type: pdflink
Text:
  Availability: 0
Header DbId: pbh
DbLabel: Psychology and Behavioral Sciences Collection
An: 85002996
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Quantum Back-Action of an Individual Variable-Strength Measurement.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Hatridge%2C+M%2E%22">Hatridge, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Shankar%2C+S%2E%22">Shankar, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Mirrahimi%2C+M%2E%22">Mirrahimi, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Schackert%2C+F%2E%22">Schackert, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Geerlings%2C+K%2E%22">Geerlings, K.</searchLink><br /><searchLink fieldCode="AR" term="%22Brecht%2C+T%2E%22">Brecht, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Sliwa%2C+K%2E+M%2E%22">Sliwa, K. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Frunzio%2C+B%2E+Abdo+L%2E%22">Frunzio, B. Abdo L.</searchLink><br /><searchLink fieldCode="AR" term="%22Girvin%2C+S%2E+M%2E%22">Girvin, S. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Schoelkopf%2C+R%2E+J%2E%22">Schoelkopf, R. J.</searchLink><br /><searchLink fieldCode="AR" term="%22Devoret%2C+M%2E+H%2E%22">Devoret, M. H.</searchLink>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 1/11/2013, Vol. 339 Issue 6116, p178-181. 4p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Quantum+theory%22">Quantum theory</searchLink><br /><searchLink fieldCode="DE" term="%22Measurement%22">Measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductors%22">Superconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Qubits%22">Qubits</searchLink><br /><searchLink fieldCode="DE" term="%22Microwaves%22">Microwaves</searchLink><br /><searchLink fieldCode="DE" term="%22Stochastic+processes%22">Stochastic processes</searchLink><br /><searchLink fieldCode="DE" term="%22Quadrature+domains%22">Quadrature domains</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+models%22">Mathematical models</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Measuring a quantum system can randomly perturb its state. The strength and nature of this back-action depend on the quantity that is measured. In a partial measurement performed by an idea[ apparatus, quantum physics predicts that the system remains in a pure state whose evolution can be tracked perfectly from the measurement record. We demonstrated this property using a superconducting qubit dispersively coupled to a cavity traversed by a microwave signal. The back-action on the qubit state of a single measurement of both signal quadratures was observed and shown to produce a stochastic operation whose action is determined by the measurement result. This accurate monitoring of a qubit state is an essential prerequisite for measurement-based feedback control of quantum systems. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=85002996
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1126/science.1226897
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 4
        StartPage: 178
    Subjects:
      – SubjectFull: Quantum theory
        Type: general
      – SubjectFull: Measurement
        Type: general
      – SubjectFull: Superconductors
        Type: general
      – SubjectFull: Qubits
        Type: general
      – SubjectFull: Microwaves
        Type: general
      – SubjectFull: Stochastic processes
        Type: general
      – SubjectFull: Quadrature domains
        Type: general
      – SubjectFull: Mathematical models
        Type: general
    Titles:
      – TitleFull: Quantum Back-Action of an Individual Variable-Strength Measurement.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Hatridge, M.
      – PersonEntity:
          Name:
            NameFull: Shankar, S.
      – PersonEntity:
          Name:
            NameFull: Mirrahimi, M.
      – PersonEntity:
          Name:
            NameFull: Schackert, F.
      – PersonEntity:
          Name:
            NameFull: Geerlings, K.
      – PersonEntity:
          Name:
            NameFull: Brecht, T.
      – PersonEntity:
          Name:
            NameFull: Sliwa, K. M.
      – PersonEntity:
          Name:
            NameFull: Frunzio, B. Abdo L.
      – PersonEntity:
          Name:
            NameFull: Girvin, S. M.
      – PersonEntity:
          Name:
            NameFull: Schoelkopf, R. J.
      – PersonEntity:
          Name:
            NameFull: Devoret, M. H.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 11
              M: 01
              Text: 1/11/2013
              Type: published
              Y: 2013
          Identifiers:
            – Type: issn-print
              Value: 00368075
          Numbering:
            – Type: volume
              Value: 339
            – Type: issue
              Value: 6116
          Titles:
            – TitleFull: Science (pre-March 2025)
              Type: main
ResultId 1