Display options
Cite
Hatridge M, Shankar S, Mirrahimi M, et al. Quantum back-action of an individual variable-strength measurement. Science. 2013;339(6116):178-81doi: 10.1126/science.1226897.
Hatridge, M., Shankar, S., Mirrahimi, M., Schackert, F., Geerlings, K., Brecht, T., Sliwa, K. M., Abdo, B., Frunzio, L., Girvin, S. M., Schoelkopf, R. J., & Devoret, M. H. (2013). Quantum back-action of an individual variable-strength measurement. Science (New York, N.Y.), 339(6116), 178-81. https://doi.org/10.1126/science.1226897
Hatridge, M, et al. "Quantum back-action of an individual variable-strength measurement." Science (New York, N.Y.) vol. 339,6116 (2013): 178-81. doi: https://doi.org/10.1126/science.1226897
Hatridge M, Shankar S, Mirrahimi M, Schackert F, Geerlings K, Brecht T, Sliwa KM, Abdo B, Frunzio L, Girvin SM, Schoelkopf RJ, Devoret MH. Quantum back-action of an individual variable-strength measurement. Science. 2013 Jan 11;339(6116):178-81. doi: 10.1126/science.1226897. PMID: 23307736.
Copy Download .nbib Format: NLM
Share it on

Science. 2013 Jan 11;339(6116):178-81. doi: 10.1126/science.1226897.

Quantum back-action of an individual variable-strength measurement.

Science (New York, N.Y.)

M Hatridge, S Shankar, M Mirrahimi, F Schackert, K Geerlings, T Brecht, K M Sliwa, B Abdo, L Frunzio, S M Girvin, R J Schoelkopf, M H Devoret

Affiliations

  1. Department of Applied Physics and Physics, Yale University, New Haven, CT 06520, USA. [email protected]

PMID: 23307736 DOI: 10.1126/science.1226897

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 ideal 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.

Publication Types