Nonstationary dephasing of two level systems

Abstract

We investigate the influence of nonstationary 1/f^mu noise, produced by interacting defects, on a quantum two-level system. Adopting a simple phenomenological model for this noise we describe exactly the corresponding dephasing in various regimes. The nonstationarity and pronounced non-Gaussian features of this noise induce new anomalous dephasing scenarii. Beyond a history-dependent critical coupling strength the dephasing time exhibits a strong dependence on the age of the noise and the decay of coherence is not exponential.

References in corpus (5)

• Quantum state engineering with Josephson-junction devices
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• Charge echo in a Cooper-pair box
• Dephasing of solid-state qubits at optimal points
• Dynamics of the Destruction and Rebuilding of a Dipole Gap in Glasses

Cited by in corpus (8)

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• Nonexponential decoherence and momentum subdiffusion in a quantum Lévy kicked rotator
• Controlled decoherence in a quantum Lévy kicked rotator
• Dephasing by a nonstationary classical intermittent noise
• Lasing in circuit quantum electrodynamics with strong noise
• Non-monotonic diffusion rates in atom-optics Lévy kicked rotor