Low- and high-frequency noise from coherent two-level systems
Abstract
Recent experiments indicate a connection between low- and high-frequency noise affecting superconducting qubits. To explain this effect we explore the possibility that both noises are produced by the same ensemble of microscopic modes, e.g., by sufficiently coherent two-level systems (TLS). This implies a relation between the noise power in different frequency domains, which depends on the distribution of the parameters of the TLSs. We show that a distribution, natural for tunneling TLSs, with a log-uniform distribution in the tunnel splitting and linear distribution in the bias, accounts for experimental observations.Keywords
All Related Versions
This publication has 0 references indexed in Scilit: