Convex-roof entanglement measures of density matrices block diagonal in disjoint subspaces for the study of thermal states
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F22%3A73613371" target="_blank" >RIV/61989592:15310/22:73613371 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/pra/pdf/10.1103/PhysRevA.105.062419" target="_blank" >https://journals.aps.org/pra/pdf/10.1103/PhysRevA.105.062419</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.105.062419" target="_blank" >10.1103/PhysRevA.105.062419</a>
Alternative languages
Result language
angličtina
Original language name
Convex-roof entanglement measures of density matrices block diagonal in disjoint subspaces for the study of thermal states
Original language description
We provide a proof that entanglement of any density matrix which is block diagonal in subspaces which are disjoint in terms of the Hilbert space of one of the two potentially entangled subsystems can simply be calculated as the weighted average of entanglement present within each block. This is especially useful for thermal-equilibrium states which always inherit the symmetries present in the Hamiltonian, since block-diagonal Hamiltonians are common, as are interactions which involve only a single degree of freedom of a greater system. We exemplify our method on a simple Hamiltonian, showing the diversity in possible temperature dependences of Gibbs state entanglement which can emerge in different parameter ranges.
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
—
OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
<a href="/en/project/GA20-16577S" target="_blank" >GA20-16577S: Hybrid quantum physics at low temperatures</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PHYSICAL REVIEW A
ISSN
2469-9926
e-ISSN
2469-9934
Volume of the periodical
105
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
"062419-1"-"062419-12"
UT code for WoS article
000830951300007
EID of the result in the Scopus database
2-s2.0-85133334194