Comparison of coherence times in three dc SQUID phase qubits

Details Comparison of coherence times in three dc SQUID phase qubits Comparison of coherence times in three dc SQUID phase qubits

2007-05-31

arxiv.org/abs/0705.4509v2

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures, accepted for publication in IEEE Trans. Appl. Supercond

Scientific paper

We report measurements of spectroscopic linewidth and Rabi oscillations in three thin-film dc SQUID phase qubits. One device had a single-turn Al loop, the second had a 6-turn Nb loop, and the third was a first order gradiometer formed from 6-turn wound and counter-wound Nb coils to provide isolation from spatially uniform flux noise. In the 6 - 7.2 GHz range, the spectroscopic coherence times for the gradiometer varied from 4 ns to 8 ns, about the same as for the other devices (4 to 10 ns). The time constant for decay of Rabi oscillations was significantly longer in the single-turn Al device (20 to 30 ns) than either of the Nb devices (10 to 15 ns). These results imply that spatially uniform flux noise is not the main source of decoherence or inhomogenous broadening in these devices.

Affiliated with

Also associated with

No associations

Rating

Comparison of coherence times in three dc SQUID phase qubits does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Comparison of coherence times in three dc SQUID phase qubits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparison of coherence times in three dc SQUID phase qubits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-288492