Work

Finite temperature single-particle Green's function in the Lieb-Liniger model

Year: 2026

Type: article

Abstract: We develop a Monte Carlo sampling algorithm to numerically evaluate the Lehmann representation for the finite temperature single-particle Green's function in the repulsive Lieb-Liniger model. This allows us to determine the spectral function in the full range of temperatures and interactions, as well as in generalized Gibbs ensembles. We test our results against known results for dynamics at infinite interaction strength and static correlators, and find excellent agreement.

Source: Physical review. B./Physical review. B

DOI: 10.1103/8qtr-dm7g

Authors: Riccardo Senese, Fabian H. L. Essler

Institution: University of Oxford

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Engineering and Physical Sciences Research Council

Award: INTERACTIVE DYNAMICS OF MANY-BODY QUANTUM SYSTEMS