Qubit-environment entanglement in time-dependent pure dephasing

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F24%3A73624584" target="_blank" >RIV/61989592:15310/24:73624584 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/24:00585721 RIV/00216208:11320/24:10483746
Result on the web
<a href="https://journals.aps.org/pra/pdf/10.1103/PhysRevA.109.032412" target="_blank" >https://journals.aps.org/pra/pdf/10.1103/PhysRevA.109.032412</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.109.032412" target="_blank" >10.1103/PhysRevA.109.032412</a>

Result language
angličtina
Original language name
Qubit-environment entanglement in time-dependent pure dephasing
Original language description
We show that the methods for quantification of system-environment entanglement that were recently developed for interactions that lead to pure decoherence of the system can be straightforwardly generalized to time-dependent Hamiltonians of the same type. This includes the if-and-only-if criteria of separability, as well as the entanglement measure applicable to qubit systems, and methods of detection of entanglement by operations and measurements performed solely on the system without accessing the environment. We use these methods to study the nature of the decoherence of a qubit-oscillator system. Qubit-oscillator entanglement is essential for developing bosonic quantum technology with quantum non-Gaussian states and its applications in quantum sensing and computing. The dominating bosonic platforms—trapped ions, electromechanics, and superconducting circuits—are based on the time-dependent gates that use such entanglement to achieve new quantum sensors and quantum error correction. The steplike time dependence of the Hamiltonian that is taken into account allows us to capture the complex interplay between the buildups of classical and quantum correlations, which could not be replicated in time-independent scenarios.
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
10306 - Optics (including laser optics and quantum optics)

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)

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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