Physics – Quantum Physics
Scientific paper
2000-08-24
Physics
Quantum Physics
4 pages, no figures; REVTeX style
Scientific paper
We investigate the control resources needed to effect arbitrary quantum dynamics. We show that the ability to perform measurements on a quantum system, combined with the ability to feed back the measurement results via coherent control, allows one to control the system to follow any desired open-system evolution. Such universal control can be achieved, in principle, through the repeated application of only two coherent control operations and a simple ``Yes-No'' measurement.
Lloyd Seth
Viola Lorenza
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