Realistic Protocol to Measure Entanglement at Finite Temperatures

Cheolhee Han, Yigal Meir, Eran Sela

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


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.

Original languageEnglish
Article number136201
JournalPhysical Review Letters
Issue number13
StatePublished - 31 Mar 2023

ASJC Scopus subject areas

  • General Physics and Astronomy


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