Academics

Emergence and breakdown of semiclassical picture in quasiparticle excited states

Time:2023-05-31 Wed 14:30-16:30

Venue:Venue: A3-2-201 ZOOM: 864 6244 4718(PW: BIMSA)

Organizer:Hongfei Shu, Hao Zou, Ruidong Zhu

Speaker:Jiaju Zhang Tianjin University

Abstract

Quasiparticles are collective modes in many-body systems that can mimic semiclassical particles under some circumstances. I will talk about the emergence of semiclassical features in quasiparticle states of quantum chains using two quantum information quantities: entanglement entropy and subsystem distance. I will also demonstrate how the semiclassical description fails for a different measure, Shannon entropy.

DATEMay 31, 2023
SHARE
Related News
    • 0

      Semiclassical analysis, geometric representation and quantum ergodicity

      AbstractQuantum Ergodicity (QE) is a classical topic in spectral geometry, which states that on a compact Riemannian manifold whose geodesic flow is ergodic with respect to the Liouville measure, the Laplacian has a density one subsequence of eigenfunctions that tends to be equidistributed. In this talk, we present the QE for unitary flat bundles. By using a mixture of semiclassical and geometr...

    • 1

      Uniqueness of equilibrium states for sectional-hyperbolic flows, including the classical Lorenz attractor

      AbstractIt has long been conjectured that the classical Lorenz attractor supports a unique measure of maximal entropy. In this talk, we will give a positive answer to this conjecture and its higher-dimensional counterpart by considering the uniqueness of equilibrium states for H\"older continuous functions on a sectional-hyperbolic attractor. we will prove that on every compact manifold with di...