Physics – Quantum Physics
Scientific paper
2003-01-08
Phys. Rev. Lett. 90 (2003) 060401
Physics
Quantum Physics
REVTeX4, 4 pages, 1 figure; to be published in Phys. Rev. Lett. (2003)
Scientific paper
10.1103/PhysRevLett.90.060401
A series of frequent measurements on a quantum system (Zeno-like measurements) is shown to result in the ``purification'' of another quantum system in interaction with the former. Even though the measurements are performed on the former system, their effect drives the latter into a pure state, irrespectively of its initial (mixed) state, provided certain conditions are satisfied.
Nakazato Hiromichi
Takazawa Tomoko
Yuasa Kazuya
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