We discuss three control strategies, all aimed at countering the effects of deciherence. The first strategy hinges upon the quantum Zeno effect, the second makes use of frequent unitary interruptions ("bang-bang" pulses) and the third of a strong, continuous coupling. Decoherence is suppressed if the frequency N of the measurements/pulses is large enough or if the coupling K is sufficiently strong. However, if N or K are large, but not sufficiently large, all procedures accelerate decoherence.
Invariant subspaces and control of decoherence
FACCHI, PAOLO;PASCAZIO, Saverio
2006-01-01
Abstract
We discuss three control strategies, all aimed at countering the effects of deciherence. The first strategy hinges upon the quantum Zeno effect, the second makes use of frequent unitary interruptions ("bang-bang" pulses) and the third of a strong, continuous coupling. Decoherence is suppressed if the frequency N of the measurements/pulses is large enough or if the coupling K is sufficiently strong. However, if N or K are large, but not sufficiently large, all procedures accelerate decoherence.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
