Probing the Excitations of a Lieb-Liniger Gas from Weak to Strong Coupling

2015/05/29 by Florian Meinert, Miłosz Panfil, Milosz Panfil +6 · 6 citations
Physics and Astronomy · #Atomic physics #Bose gas #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Excitation #Feshbach resonance #Materials science #Molecule #Physics #Quantum many-body systems #Quantum mechanics #Quantum, superfluid, helium dynamics #Quasiparticle #Resonance (particle physics) #Spectroscopy #cond-mat.quant-gas

paper · pdf · doi:10.1103/physrevlett.115.085301

published as Phys. Rev. Lett. 115, 085301 (2015) · 9 pages, 10 figures

arxiv created 2015/05/29 · openalex publication_date 2015/08/20 · arxiv updated 2015/08/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We probe the excitation spectrum of an ultracold one-dimensional Bose gas of cesium atoms with a repulsive contact interaction that we tune from the weakly to the strongly interacting regime via a magnetic Feshbach resonance. The dynamical structure factor, experimentally obtained using Bragg spectroscopy, is compared to integrability-based calculations valid at arbitrary interactions and finite temperatures. Our results unequivocally underlie the fact that holelike excitations, which have no counterpart in higher dimensions, actively shape the dynamical response of the gas.

Cited by

• Probing non-thermal density fluctuations in the one-dimensional Bose gas
• The two particle–hole pairs contribution to the dynamic correlation functions of quantum integrable models
• Unraveling the excitation spectrum of many-body systems from quantum quenches
• Dynamical structure factor of one-dimensional hard rods
• Exact correlations in the Lieb-Liniger model and detailed balance out-of-equilibrium
• Conformal field theory for inhomogeneous one-dimensional quantum systems: the example of non-interacting Fermi gases
• Exactly Solvable System of One-Dimensional Trapped Bosons with Short- and Long-Range Interactions

Related

• Correlations in low-dimensional quantum gases
• Low Energy Excitations of a 1D Fermi Gas with Attractive Interactions
• Lack of collisional hydrodynamics in a harmonically trapped one-dimensional Bose gas
• Calogero-Sutherland-Lieb-Liniger gas in one-dimensional cold atoms
• Renormalized atomic interaction and quadrupole excitations of cold Fermi gas near Feshbach resonance