Sensitivity of entanglement decay of quantum-dot spin qubits to the external magnetic field

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10283184" target="_blank" >RIV/00216208:11320/14:10283184 - isvavai.cz</a>
Result on the web
<a href="http://journals.aps.org/pra/abstract/10.1103/PhysRevA.89.062318" target="_blank" >http://journals.aps.org/pra/abstract/10.1103/PhysRevA.89.062318</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.89.062318" target="_blank" >10.1103/PhysRevA.89.062318</a>

Result language
angličtina
Original language name
Sensitivity of entanglement decay of quantum-dot spin qubits to the external magnetic field
Original language description
We study the decay of entanglement of quantum-dot electron-spin qubits under hyperfine-interaction-mediated decoherence. We show that two-qubit entanglement of a single entangled initial state may exhibit decay characteristic of two disentanglement regimes in a single sample, when the external magnetic field is changed. The transition is manifested by the suppression of time-dependent entanglement oscillations which are superimposed on the slowly varying entanglement decay related to phase decoherence which results in oscillatory behavior of entanglement sudden death time as a function of the magnetic field. This unique behavior allows us to propose the doublequantum-dot two-electron spin Bell state as a promising candidate for precise measurements ofthe magnetic field.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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