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

The efficient initialization of a quantum system is a prerequisite forquantum technological applications. Here we show that several classes ofquantum states of a harmonic oscillator can be efficiently prepared by means ofa Jaynes-Cummings interaction with a single two-level system. This is achievedby suitably tailoring external fields which drive the dipole and/or theoscillator. The time-dependent dynamics that leads to the target state isidentified by means of Optimal Control Theory (OCT) based on Krotov's method.Infidelities below $10^{-4}$ can be reached for the parameters of theexperiment of the ENS group in Paris, where the oscillator is a mode of ahigh-Q microwave cavity and the dipole is a Rydberg transition of an atom. Forthis specific situation we analyze the limitations on the fidelity due toparameter fluctuations and identify robust dynamics based on pulses found usingensemble OCT. Our analysis can be extended to quantum-state preparation ofcontinuous-variable systems in other platforms, such as trapped ions andcircuit QED.

Arbitrary quantum-state preparation of a harmonic oscillator via optimal control