Interacting tunneling model for two-level systems in amorphous materials and its predictions for their dephasing and noise in superconducting microresonators

2014/04/09 by Lara Faoro, L. B. Ioffe, Lev B. Ioffe · 111 citations
Chemistry · Physics and Astronomy · #Amorphous solid #Chemistry #Computer science #Condensed matter physics #Dephasing #Materials science #Noise (video) #Photorefractive and Nonlinear Optics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum tunnelling #Superconductivity #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.91.014201

published in Physical Review B 91(1) (American Physical Society)

arxiv created 2014/04/09 · openalex publication_date 2015/01/16 · arxiv updated 2015/06/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We use a tunneling model for two-level systems in insulators that takes into account the interaction between them and a slow power-law dependence of their density of states. We show that the predictions of this model are in a perfect agreement with the recent studies of the noise in high quality superconducting resonators. The predictions also agree with the temperature dependence of the TLS dephasing rates observed in phase qubits. Both observations are impossible to explain in the framework of the standard tunneling model of TLS. We discuss the origin of the universal dimensionless parameter that controls the interaction between TLS in glasses and show that it is consistent with the assumptions of the model.

Citations

• Evidence for interacting two-level systems from the 1/f noise of a superconducting resonator
• Experimental evidence for a surface distribution of two-level systems in superconducting lithographed microwave resonators
• Anomalous low-temperature thermal properties of glasses and spin glasses
• A semiempirical model for two-level system noise in superconducting microresonators
• Coulomb gap and low temperature conductivity of disordered systems
• Measuring the Temperature Dependence of Individual Two-Level Systems by Direct Coherent Control

Cited by

• Origin of mechanical and dielectric losses from two-level systems in amorphous silicon
• Spatially Resolved Optical Responses of a High-Kinetic-Inductance Microwave Resonator