Generation of the Schrödinger-cat state by continuous photodetection

1 June 1991

journal article
research article
Published by American Physical Society (APS) in Physical Review A

Vol. 43 (11) , 6458-6461
https://doi.org/10.1103/physreva.43.6458

Abstract

Nonunitary time evolution of an initially highly squeezed state under continuous photon-number measurement is investigated using the quasiprobability distribution. It is found that the measured quantum state bifurcates into two macroscopically distinguishable states upon the detection of a single photon, while preserving purity by feeding back real-time readout information.

Keywords

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