Low- and high-frequency noise from coherent two-level systems |
| |
Authors: | Shnirman Alexander Schön Gerd Martin Ivar Makhlin Yuriy |
| |
Institution: | Institut für Theoretische Festk?rperphysik, Universit?t Karlsruhe, D-76128 Karlsruhe, Germany. |
| |
Abstract: | Recent experiments indicate a connection between the low- and high-frequency noises affecting superconducting quantum systems. We explore the possibilities that both noises can be produced by one ensemble of microscopic modes, made up, e.g., by sufficiently coherent two-level systems (TLS's). This implies a relation between the noise power in different frequency domains, which depends on the distribution of the parameters of the TLS's. We show that a distribution, natural for tunneling TLS's, with a log-uniform distribution in the tunnel splitting and linear distribution in the bias, accounts for experimental observations. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|