2005/12/22 by Josef Schriefl, Yuriy Makhlin, Alexander Shnirman +1 · 4 citations
Computer Science · Mathematics · Physics and Astronomy · #Quantum Information and Cryptography #Random Matrices and Applications #cond-mat.mes-hall #stochastic dynamics and bifurcation
paper · pdf · doi:10.1088/1367-2630/8/1/001
published as New J. Phys. 8, 1 (2006) · accepted in New Journal of Physics
arxiv created 2005/12/22 · openalex publication_date 2006/01/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
1/ f noise, the major source of dephasing in Josephson qubits, may be produced by an ensemble of two-level systems. Depending on the statistical properties of their distribution, the noise distribution can be Gaussian or non-Gaussian. The latter situation is realized, for instance, when the distribution of coupling strengths has a slowly decaying power-law tail. In this regime, questions of self-averaging and sample-to-sample fluctuations become crucial. We study the dephasing process for a class of distribution functions and analyse the self-averaging properties of the results.