Year: 2023
Type: article
Abstract: Many-body entanglement in condensed matter systems can be diagnosed from equilibrium response functions through the use of entanglement witnesses and operator-specific quantum bounds. Here, we investigate the applicability of this approach for detecting entangled states in quantum systems driven out of equilibrium. We use a multipartite entanglement witness, the quantum Fisher information, to study the dynamics of a paradigmatic fermion chain undergoing a time-dependent change of the Coulomb interaction. Our results show that the quantum Fisher information is able to witness distinct signatures of multipartite entanglement both near and far from equilibrium that are robust against decoherence. We discuss implications of these findings for probing entanglement in light-driven quantum materials with time-resolved optical and x-ray scattering methods.
Source: Physical Review Letters
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1045617361, G2765931601, G2797134947, G3356704239, Study on the mechanisms of antimony migration, transformation, and isotope fractional during the weathering of solid waste containing antimon, G5813374984, EAGER: SUPER: Light-Induced Room-Temperature Superconductivity at Light Pressure, Quantum simulation of ultrafast strong-field physics with ultracold atoms trapped in optical lattices, G6614740115, EXC 2004: Materie und Licht für Quanteninformation (ML4Q), G8558604674
OpenAlex ID: W4323310653