Decoherence from ensembles of two-level fluctuators
| Autor: | Alexander Shnirman, Josef Schriefl, Gerd Schön, Yuriy Makhlin |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Physics
Quantum decoherence Condensed Matter - Mesoscale and Nanoscale Physics Distribution (number theory) Gaussian Dephasing FOS: Physical sciences General Physics and Astronomy Noise (electronics) Coupling (physics) symbols.namesake Distribution function Qubit Mesoscale and Nanoscale Physics (cond-mat.mes-hall) symbols Statistical physics |
| Zdroj: | New Journal of Physics. 8:1-1 |
| ISSN: | 1367-2630 |
| DOI: | 10.1088/1367-2630/8/1/001 |
| Popis: | 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 analyze the self-averaging properties of the results. accepted in New Journal of Physics |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|