Realistic Protocol to Measure Entanglement at Finite Temperatures.
Phys Rev Lett
; 130(13): 136201, 2023 Mar 31.
Article
em En
| MEDLINE
| ID: mdl-37067316
ABSTRACT
It is desirable to relate entanglement of many-body systems to measurable observables. In systems with a conserved charge, it was recently shown that the number entanglement entropy (NEE)-i.e., the entropy change due to an unselective subsystem charge measurement-is an entanglement monotone. Here we derive finite-temperature equilibrium relations between Rényi moments of the NEE, and multipoint charge correlations. These relations are exemplified in quantum dot systems where the desired charge correlations can be measured via a nearby quantum point contact. In quantum dots recently realizing the multichannel Kondo effect we show that the NEE has a nontrivial universal temperature dependence which is now accessible using the proposed methods.
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MEDLINE
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En
Ano de publicação:
2023
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Article