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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

A general theory is presented for the treatment of decoherence of amultilevel quantum system (with many degrees of freedom) interacting withmulti-bath reservoir and driven by ac fields. In this approach, the system isdescribed by a reduced density operator and the multi-bath reservoir ischaracterized by a number of spectral densities. The reduced density operatoris governed by the master equation in which the effect of ac driving fields andthe leakage to non-computational states are included. The theory is applied tothe study of decoherence of a two-dimensional (2D) SQUID flux qubit coupled tocontrol and readout circuits. The predicted results are in very good agreementwith available experimental results in the absence of driving fields and withthe analytic results of a dissipative two-level system in the presence of weakdriving fields. The relaxation and decoherence times versus the parameters andtemperature of the control and readout circuits are also explored in details tofacilitate the optimization of the 2D SQUID qubit.

Decoherence of a driven multilevel quantum system interacting with a multi-bath reservoir