English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We study the dynamics of dephasing in a quantum two-level system by modelingboth 1/f and high-frequency noise by random telegraph processes. Our approachis based on a so-called spin-fluctuator model in which a noisy environment ismodeled by a large number of fluctuators. In the continuous limit we obtain aneffective random process (ERP) that is described by a distribution function ofthe fluctuators. In a simplified model, we reduce the ERP to the two (slow andfast) ensembles of fluctuators. Using this model, we study decoherence in asuperconducting flux qubit and we compare our theoretical results with theavailable experimental data. We demonstrate good agreement of our theoreticalpredictions with the experiments. Our approach can be applied to many quantumsystems, such as biological complexes, semiconductors, superconducting and spinqubits, where the effects of interaction with the environment are essential.

Modeling of Low and High Frequency Noise by Slow and Fast Fluctuators