Abstract
We propose to measure the quantum state of a single mode of the radiation field in a cavity—the signal field—by coupling it via a quantum-non-demolition Hamiltonian to a meter field in a highly squeezed state. We show that quantum-state tomography on the meter field using balanced homodyne detection provides full information about the signal state. We discuss the influence of measurement of the meter on the signal field.
- Received 27 March 1998
DOI:https://doi.org/10.1103/PhysRevA.59.718
©1999 American Physical Society