QUANTUM DYNAMICS OF A COOPER PAIR TRANSITOR COUPLED TO A DC-SQUID Aurélien Fay under the supervision of : Olivier BUISSON - Wiebke GUICHARD - Laurent LEVY.

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Presentation transcript:

QUANTUM DYNAMICS OF A COOPER PAIR TRANSITOR COUPLED TO A DC-SQUID Aurélien Fay under the supervision of : Olivier BUISSON - Wiebke GUICHARD - Laurent LEVY Centre de Recherche sur les Très Basses Températures Laboratoire des Champs Magnétiques Intenses (GHMFL) GRENOBLE

CIRCUIT FABRICATION BY ELECTRONIC LITHOGRAHY DC-SQUID COOPER PAIR TRANSISTOR

CHARGE QUBIT : COOPER PAIR TRANSISTOR Charge Energy Josephson Energy Two levels system at p g = 0.5 VgVg 300 nm

JJs 15 μm² superconducting loop 15  m IpIp  dc PHASE QUBIT : DC-SQUID |0|0 |1|1 |2|2 MW  p (I p,  dc )  U (I p,  dc ) J. Claudon and al., Coherent oscillations in a superconducting multi-level quantum system, Phys. Rev. Lett. 93, (2004). Multi level system

1/190 MHz COUPLING BETWEEN A COOPER PAIR TRANSISTOR AND DC-SQUID (TRSQ) 190 MHz  pulse PgPg t VgVg On resonance

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