Measuring entanglement entropy and its topological signature for phononic systems.

ABSTRACT: Entanglement entropy is a fundamental concept with rising importance in various fields ranging from quantum information science, black holes to materials science. In complex materials and systems, entanglement entropy provides insight into the collective degrees of freedom that underlie the systems' complex behaviours. As well-known predictions, the entanglement entropy exhibits area laws for systems with gapped excitations, whereas it follows the Gioev-Klich-Widom scaling law in gapless fermion systems. However, many of these fundamental predictions have not yet been confirmed in experiments due to the difficulties in measuring entanglement entropy in physical systems. Here, we report the experimental verification of the above predictions by probing the nonlocal correlations in phononic s

SUBMITTER: Lin ZK 

PROVIDER: S-EPMC10881961 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature