Asymmetry and decoherence in a double-layer persistent-current qubit

Details Asymmetry and decoherence in a double-layer persistent-current qubit Asymmetry and decoherence in a double-layer persistent-current qubit

2004-05-13

arxiv.org/abs/cond-mat/0405273v2

Phys. Rev. B 71, 134504 (2005)

Physics

Condensed Matter

Superconductivity

v.2: published version; 8 pages, 12 figures; added comparison with experiment, improved discussion of T_phi

Scientific paper

10.1103/PhysRevB.71.134504

Superconducting circuits fabricated using the widely used shadow evaporation technique can contain unintended junctions which change their quantum dynamics. We discuss a superconducting flux qubit design that exploits the symmetries of a circuit to protect the qubit from unwanted coupling to the noisy environment, in which the unintended junctions can spoil the quantum coherence. We present a theoretical model based on a recently developed circuit theory for superconducting qubits and calculate relaxation and decoherence times that can be compared with existing experiments. Furthermore, the coupling of the qubit to a circuit resonance (plasmon mode) is explained in terms of the asymmetry of the circuit. Finally, possibilities for prolonging the relaxation and decoherence times of the studied superconducting qubit are proposed on the basis of the obtained results.

Affiliated with

Also associated with

No associations

Rating

Asymmetry and decoherence in a double-layer persistent-current qubit 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 Asymmetry and decoherence in a double-layer persistent-current qubit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asymmetry and decoherence in a double-layer persistent-current qubit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-671173