Year: 2026
Type: article
Abstract: We study the dynamics of a lattice hard-core boson gas released from a domain wall initial state in the presence of two weak links (defects). When the two defects are separated by a finite distance, the resulting density profile exhibits interferences, while when we take the large-distance limit between the two defects, those interferences are averaged out and one recovers a profile that is described by the standard Euler-scale hydrodynamic description of the gas. We analyze this in detail by computing the exact fermionic propagators and their repeated reflections at the defects. We derive a closed analytic expression for the density profile during the expansion, explicitly highlighting the role played by these interference processes.
Institutions: Centre National de la Recherche Scientifique, University of Ljubljana, Laboratoire de Physique et Chimie Théoriques, Université de Lorraine, Institut de Science et d'Ingénierie Supramoléculaires, Université de Strasbourg, Scuola Internazionale Superiore di Studi Avanzati, Istituto Nazionale di Fisica Nucleare
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,290
OpenAlex ID: W7147415913