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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

With increasing performance of actual qubit devices, even subtle effects inthe interaction between qubits and environmental degrees of freedom becomeprogressively relevant and experimentally visible. This applies particularly tothe timescale separations that are at the basis of the most commonly usednumerical simulation platform for qubit operations, namely, the conventionalLindblad master equation (LE): the Markov approximation and the rotating waveapproximation (RWA). In this contribution we shed light on the questions (i) towhich extent it is possible to monitor violations of either of these timescaleseparations experimentally and (ii) which of them is the most severe to providehighly accurate predictions within (approximate) numerical schemes in relevantparameter ranges. For this purpose, we compare three simulation methods for thereduced density matrix with progressively growing accuracy. In particular,predictions for relaxation and decoherence of a qubit system in presence ofreservoirs with Ohmic and sub-Ohmic spectral densities are explored and, withthe aid of proper protocols based on Ramsey experiments, the role ofnon-Markovianity and RWA are revealed. We discuss potential implications forfuture experiments and the design of approximate yet accurate numericalapproaches.

Qubit Dynamics beyond Lindblad: Non-Markovianity versus Rotating Wave Approximation