<div class="csl-bib-body">
<div class="csl-entry">Minoguchi, Y. S., Arrazola Maiztegui, I., & Rabl, P. (2022, March 1). <i>Decoherence dynamics of dressed qubits</i> [Poster Presentation]. QUENOCOBA Workshop, Garching, Germany.</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/136099
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dc.description.abstract
The dressing of two-level systems (qubits) by a resonant radiation field is one of the most common methods to actively protect quantum states from dephasing. Here, we study the dynamics of a continuously driven qubit in the presence of qubit-frequency fluctuations represented by an Orstein-Ulhenbeck process. Following a stochastic path integral approach, we analytically characterise the decay of coherence on function of the relevant parameters of the system, and identify the main differences between the different regimes.On top of that, we consider the effect of fluctuations in the amplitude of the driving field, which may become the main source of decoherence for strong drivings. Furthermore, we propose to combine the qubit dressing with refocusing techniques using fast phase flips in the driving field. We also derive analytical expressions that allow us to characterise the enhancement of coherence times by these phase flips, and identify the regimes with optimal performance. Finally, we benchmark our analytical results with exact numerical simulations.
en
dc.description.sponsorship
European Commission
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dc.language.iso
en
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dc.subject
quantum control
en
dc.subject
dynamical decoupling
en
dc.title
Decoherence dynamics of dressed qubits
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.relation.grantno
899354
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dc.type.category
Poster Presentation
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tuw.project.title
Quantum Local Area Networks with Superconducting Qubits
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tuw.researchTopic.id
Q5
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tuw.researchTopic.name
Design and Engineering of Quantum Systems
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tuw.researchTopic.value
100
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tuw.publication.orgunit
E141-08 - Forschungsbereich Quantum Optics and Quantum Information
