quantum dynamics of a cooper pair transitor coupled to a dc-squid aurélien fay under the...
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QUANTUM DYNAMICS OF A COOPER PAIR TRANSITORCOUPLED 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-SQUIDCOOPER PAIR TRANSISTOR
CHARGE QUBIT : COOPER PAIR TRANSISTOR
Charge Energy Josephson Energy
Two levels system at pg = 0.5
Vg
300 nm
JJs15 μm²
superconducting loop
15 m
Ip
dc
PHASE QUBIT : DC-SQUID
|0|1
|2
MW
p(Ip, dc )
U (Ip, dc )
J. Claudon and al., Coherent oscillations in a superconducting multi-level quantum system, Phys. Rev. Lett. 93, 187003 (2004).
Multi level system
1/190 MHz-1
0.5
COUPLING BETWEEN A COOPER PAIR TRANSISTOR AND DC-SQUID (TRSQ)
190 MHz
pulse
0.553
Pg
t
Vg
On resonance
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