Influence of low-frequency noise on macroscopic quantum tunneling in superconducting circuits
arXiv:cond-mat/0411633 · doi:10.1103/PhysRevB.71.134501
Abstract
The influence of low to moderate frequency environments on Macroscopic Quantum Tunneling (MQT) in superconducting circuits is studied within the Im-F approach to evaluate tunneling rates. Particular attention is paid to two model environments, namely, a pure sluggish bath and a sluggish bath with additional 1/f-noise. General findings are applied to Zener flip tunneling, a MQT phenomenon recently predicted and observed in a superconducting circuit implementing a quantum bit.
arXiv comment11 pages, 7 figures
References in corpus (12)
- Coherent control of macroscopic quantum states in a single-Cooper-pair box
- Manipulating the Quantum State of an Electrical Circuit
- Coherent Quantum Dynamics of a Superconducting Flux Qubit
- Decoherence and 1/f noise in Josephson qubits
- Dephasing of solid-state qubits at optimal points
- Decoherence in Josephson-junction qubits due to critical current fluctuations
- Noise and decoherence in quantum two-level systems
- Josephson junctions as threshold detectors for full counting statistics
- Enhancement of Macroscopic Quantum Tunneling by Landau-Zener Transitions
- Effect of the shot-noise on a Coulomb blockaded single Josephson junction
- Qubit decoherence by low-frequency noise
- Semiclassical time evolution of the density matrix and tunneling