We study the problem of preparing and operating with a dissipative two-state system in the presence of an external driving held. We derive an exact master equation for the populations and we show that the initial preparation strongly affects the transient dynamics in the underdamped regime and that an appropriately tuned external a.c.-field can slow down decoherence. We finally discuss the connection with the problem of controlling the dynamics of a CJ Qubit.
Decoherence and preparation effects in mesoscopic systems
PALADINO, ELISABETTA;FALCI, Giuseppe;
2000-01-01
Abstract
We study the problem of preparing and operating with a dissipative two-state system in the presence of an external driving held. We derive an exact master equation for the populations and we show that the initial preparation strongly affects the transient dynamics in the underdamped regime and that an appropriately tuned external a.c.-field can slow down decoherence. We finally discuss the connection with the problem of controlling the dynamics of a CJ Qubit.File in questo prodotto:
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