Laser switch for stroboscopic read-out of magnetic flux (Articolo in rivista)

Type
Label
  • Laser switch for stroboscopic read-out of magnetic flux (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.1755440 (literal)
Alternative label
  • Castellano, Maria Gabriella (3); Chiarello, Fabio (3); TORRIOLI, GUIDO (3); Ferrara, Marco (4); CARELLI, PASQUALE (2); Cosmelli, Carlo (1) (2004)
    Laser switch for stroboscopic read-out of magnetic flux
    in Review of scientific instruments
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Castellano, Maria Gabriella (3); Chiarello, Fabio (3); TORRIOLI, GUIDO (3); Ferrara, Marco (4); CARELLI, PASQUALE (2); Cosmelli, Carlo (1) (literal)
Pagina inizio
  • 2116 (literal)
Pagina fine
  • 2121 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 75 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 6 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Università la Sapienza - ; (2) Dipartimento di Fisica and INFM - Università di L'Aquila; (3) CNR-IFN - Ist. di Fotonica e Nanotecnologie; (4) Università di l'Aquila - Monteluco di Roio (literal)
Titolo
  • Laser switch for stroboscopic read-out of magnetic flux (literal)
Abstract
  • We have realized and tested a fast stroboscopic detector for magnetic flux measurements. The key element of our detector is a hysteretic dc superconducting quantum interference device (SQUID). Stroboscopic read-out of the magnetic flux coupled with the SQUID is accomplished by biasing the SQUID with fast current pulses. The shorter these pulses, the more stroboscopic and less invasive the measurement we are performing. In order to reduce the duration of the current pulses, we take advantage of the superconducting-normal transition induced by laser light in thin superconducting films. The interaction of laser light with superconducting thin films has been investigated thoroughly in the past and many applications have been proposed which rely on the fast typical times with which superconductivity is broken and a resistive behavior arises. We have measured a threshold resolution of 6.9mPhi(0) at 4.2 K, and this value corresponds to the thermodynamic limit of the SQUID. The detector has been accurately characterized: An improved and more sensitive version might prove useful for quantum mechanics and quantum computation experiments, for example, in detecting the state of flux qubits. (literal)
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