Ultrastrong coupling regime of cavity QED with phase-biased flux qubits

Details Ultrastrong coupling regime of cavity QED with phase-biased flux qubits Ultrastrong coupling regime of cavity QED with phase-biased flux qubits

2009-06-08

arxiv.org/abs/0906.1383v2

Phys. Rev. A 80, 032109 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 7 figures. Published version with minor changes and corrections

Scientific paper

10.1103/PhysRevA.80.032109

We theoretically study a circuit QED architecture based on a superconducting flux qubit directly coupled to the center conductor of a coplanar waveguide transmission-line resonator. As already shown experimentally [Abdumalikov et al. Phys. Rev. B 78, 180502 (2008)], the strong coupling regime of cavity QED can readily be achieved by optimizing the local inductance of the resonator in the vicinity of the qubit. In addition to yielding stronger coupling with respect to other proposals for flux qubit based circuit QED, this approach leads to a qubit-resonator coupling strength g which does not scale as the area of the qubit but is proportional to the total inductance shared between the resonator and the qubit. Strong coupling can thus be attained while still minimizing sensitivity to flux noise. Finally, we show that by taking advantage of the the large kinetic inductance of a Josephson junction in the center conductor of the resonator can lead to coupling energies of several tens of percent of the resonator frequency, reaching the ultrastrong coupling regime of cavity QED where the rotating-wave approximation breaks down. This should allow an on-chip implementation of the E x B Jahn-Teller model.

Affiliated with

Also associated with

No associations

Rating

Ultrastrong coupling regime of cavity QED with phase-biased flux 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 Ultrastrong coupling regime of cavity QED with phase-biased flux qubits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrastrong coupling regime of cavity QED with phase-biased flux qubits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-231453