Tunable phonon-induced steady-state coherence in a double-quantum-dot charge qubit
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73600829" target="_blank" >RIV/61989592:15310/20:73600829 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/articles/s41534-020-0256-6.pdf" target="_blank" >https://www.nature.com/articles/s41534-020-0256-6.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41534-020-0256-6" target="_blank" >10.1038/s41534-020-0256-6</a>
Alternative languages
Result language
angličtina
Original language name
Tunable phonon-induced steady-state coherence in a double-quantum-dot charge qubit
Original language description
Charge qubits can be created and manipulated in solid-state double-quantum-dot (DQD) platforms. Typically, these systems are strongly affected by quantum noise stemming from coupling to substrate phonons. This is usually assumed to lead to decoherence towards steady states that are diagonal in the energy eigenbasis. In this article, we show, to the contrary, that due to the presence of phonons the equilibrium steady state of the DQD charge qubit spontaneously exhibits coherence in the energy eigenbasis with high purity. The magnitude and phase of the coherence can be controlled by tuning the Hamiltonian parameters of the qubit. The coherence is also robust to the presence of fermionic leads. In addition, we show that this steady-state coherence can be used to drive an auxiliary cavity mode coupled to the DQD.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
npj Quantum Information
ISSN
2056-6387
e-ISSN
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Volume of the periodical
6
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
"27-1"-"27-7"
UT code for WoS article
000520976000002
EID of the result in the Scopus database
2-s2.0-85081988332