Continuous monitoring of Rabi oscillations in a Josephson flux qubit.
Under resonant irradiation, a quantum system can undergo coherent (Rabi) oscillations in time. We report evidence for such oscillations in a continuously observed three-Josephson-junction flux qubit, coupled to a high-quality tank circuit tuned to the Rabi frequency. In addition to simplicity, this method of Rabi spectroscopy enabled a long coherence time of about 2.5 micros, corresponding to an effective qubit quality factor approximately 7000.
Il'ichev
E
E
Institute for Physical High Technology, P.O. Box 100239, D-07702 Jena, Germany.
Oukhanski
N
N
Izmalkov
A
A
Wagner
Th
T
Grajcar
M
M
Meyer
H-G
HG
Smirnov
A Yu
AY
Maassen van den Brink
Alec
A
Amin
M H S
MH
Zagoskin
A M
AM