Qubit-environment entanglement outside of pure decoherence: Hyperfine interaction

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00571605" target="_blank" >RIV/68378271:_____/23:00571605 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevB.107.085428" target="_blank" >https://doi.org/10.1103/PhysRevB.107.085428</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.107.085428" target="_blank" >10.1103/PhysRevB.107.085428</a>

Result language
angličtina
Original language name
Qubit-environment entanglement outside of pure decoherence: Hyperfine interaction
Original language description
In spin-based architectures of quantum devices, the hyperfine interaction between the electron spin qubit and the nuclear spin environment remains one of the main sources of decoherence. This paper provides a short review of the current advances in the theoretical description of the qubit decoherence dynamics. Next, we study the qubit-environment entanglement using negativity as its measure. For an initial maximally mixed state of the environment, we study negativity dynamics as a function of environment size, changing the numbers of environmental nuclei and the total spin of the nuclei. Furthermore, we study the effect of the magnetic field on qubit-environment disentangling timescales.
Czech name
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Czech description
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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
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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