The properties of the activation potential of a Josephson interferometer are investigated under the effect of external microwave signals. In particular, we measure the effects of the microwaves on an interferometer having a low inductance. Using as a probing tool thermal escape techniques we find that the plasma frequency excitations of this system when exposed to the radiation field are well described by a double-pendulum equation under the same ac biasing conditions. We discuss the results within the framework of the recent investigations on macroscopic quantum coherence. (c) 2006 Elsevier B.V. All rights reserved.
Investigation of Josephson interferometer potentials by ac excitations
M G Castellano;F Chiarello;R Leoni;D Simeone;G Torrioli
2006
Abstract
The properties of the activation potential of a Josephson interferometer are investigated under the effect of external microwave signals. In particular, we measure the effects of the microwaves on an interferometer having a low inductance. Using as a probing tool thermal escape techniques we find that the plasma frequency excitations of this system when exposed to the radiation field are well described by a double-pendulum equation under the same ac biasing conditions. We discuss the results within the framework of the recent investigations on macroscopic quantum coherence. (c) 2006 Elsevier B.V. All rights reserved.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.
