Title :
Noise in superconducting qubits and spin glasses
Author :
Yu, Clare C. ; Zhi Chen
Author_Institution :
Dept. of Phys. & Astron., Univ. of California, Irvine, Irvine, CA, USA
Abstract :
Flux noise in superconducting quantum interference devices (SQUIDs) is produced by spins on the surface of metals. We have modeled these with Monte Carlo simulations of 2D and 3D Ising spin glasses that produce magnetization noise SM consistent with flux noise. The frequency dependence of the magnetization noise goes as 1/fα where the exponent a varies slightly with temperature. In 3D the noise power spectrum in the order parameter q goes as 1/ f1.4 at Tc. The low frequency noise in both q and the magnetization is a maximum at Tc.
Keywords :
Ising model; Monte Carlo methods; SQUIDs; magnetisation reversal; spin glasses; 2D Ising spin glasses; 3D Ising spin glasses; Monte Carlo simulations; SQUID; flux noise; magnetization noise; superconducting quantum interference devices; superconducting qubit noise; Glass; Low-frequency noise; Magnetization; SQUIDs; Superconducting device noise; Temperature dependence;
Conference_Titel :
Noise and Fluctuations (ICNF), 2013 22nd International Conference on
Conference_Location :
Montpellier
Print_ISBN :
978-1-4799-0668-0
DOI :
10.1109/ICNF.2013.6579005
