Phys. Rev. Lett. 97, 180403 (2006) [4 pages]Efficient Quantum-State Estimation by Continuous Weak Measurement and Dynamical ControlReceived 12 June 2006; published 31 October 2006 We demonstrate a fast, robust, and nondestructive protocol for quantum-state estimation based on continuous weak measurement in the presence of a controlled dynamical evolution. Our experiment uses optically probed atomic spins as a test bed and successfully reconstructs a range of trial states with fidelities of ∼90%. The procedure holds promise as a practical diagnostic tool for the study of complex quantum dynamics, the testing of quantum hardware, and as a starting point for new types of quantum feedback control. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.180403
DOI:
10.1103/PhysRevLett.97.180403
PACS:
03.65.Wj, 03.65.Ta, 03.67.−a, 32.80.Qk
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.