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Dephasing of Quantum Evolution: Is It Useful?
Author(s) -
Kofman A.G.,
Kurizki G.
Publication year - 2000
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/(sici)1521-3978(200005)48:5/7<447::aid-prop447>3.0.co;2-c
Subject(s) - dephasing , quantum zeno effect , observable , physics , zeno's paradoxes , quantum , quantum mechanics , space (punctuation) , time evolution , quantum decoherence , computer science , mathematics , geometry , operating system
It is shown that the quantum Zeno effect, i.e., inhibition of spontaneous decay by frequent dephasing (measurements), is observable only in spectrally finite reservoirs, e.g., in cavities, using a sequence of evolution‐interrupting pulses or randomly‐modulated CW fields. By contrast, non‐destructive measurements can only accelerate decay in free space, via the anti‐Zeno effect.