Abstract
We show that under certain circumstances a simple quantum harmonic oscillator driven by a quantum current evolves to unique pure states even if started as a mixed state. In various limits, these states exhibit nonclassical properties such as sub-Poissonian statistics, or more interestingly resemble macroscopic superpositions.
- Received 4 January 1989
DOI:https://doi.org/10.1103/PhysRevLett.63.934
©1989 American Physical Society