Experimental demonstration of an oscillator stabilized Josephson flux qubit.
We experimentally demonstrate the use of a superconducting transmission line, shorted at both ends, to stabilize the operation of a tunable flux qubit. Using harmonic-oscillator stabilization and pulsed dc operation, we have observed Larmor oscillations with a single shot visibility of 90%. In another qubit, the visibility was 60% and there was no measurable visibility reduction after 35 ns.
Koch
R H
RH
IBM Watson Research Center, Yorktown Heights, New York 10598, USA.
Keefe
G A
GA
Milliken
F P
FP
Rozen
J R
JR
Tsuei
C C
CC
Kirtley
J R
JR
DiVincenzo
D P
DP