Dephasing of a superconducting qubit induced by photon noise

Details Dephasing of a superconducting qubit induced by photon noise Dephasing of a superconducting qubit induced by photon noise

2005-12-18

arxiv.org/abs/cond-mat/0512428v1

Phys. Rev. Lett. 95, 257002 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

New version of earlier paper arXiv/0507290 after in-depth rewriting

Scientific paper

10.1103/PhysRevLett.95.257002

We have studied the dephasing of a superconducting flux-qubit coupled to a DC-SQUID based oscillator. By varying the bias conditions of both circuits we were able to tune their effective coupling strength. This allowed us to measure the effect of such a controllable and well-characterized environment on the qubit coherence. We can quantitatively account for our data with a simple model in which thermal fluctuations of the photon number in the oscillator are the limiting factor. In particular, we observe a strong reduction of the dephasing rate whenever the coupling is tuned to zero. At the optimal point we find a large spin-echo decay time of $4 \mu s$.

Affiliated with

Also associated with

No associations

Rating

Dephasing of a superconducting qubit induced by photon noise 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 Dephasing of a superconducting qubit induced by photon noise, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dephasing of a superconducting qubit induced by photon noise will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-281025