Work

Tunable Superdiffusion in Integrable Spin Chains Using Correlated Initial States

Year: 2024

Type: article

Abstract: Although integrable spin chains host only ballistically propagating particles, they can still feature diffusive charge transfer. This diffusive charge transfer originates from quasiparticle charge fluctuations inherited from the initial state's magnetization Gaussian fluctuations. We show that ensembles of initial states with quasi-long-range correlations lead to superdiffusive charge transfer with a tunable dynamical exponent. We substantiate our prediction with numerical simulations and discuss how finite time and finite size effects might cause deviations.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.132.176303

Authors: Hansveer Singh, Michael H. Kolodrubetz, Sarang Gopalakrishnan, Romain Vasseur

Institutions: University of Massachusetts Amherst, The University of Texas at Dallas, Princeton University

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

Funders: National Science Foundation, Alfred P. Sloan Foundation, Welch Foundation, Division of Materials Research

Awards: ExpandQISE: Track 2: Neutral Atom Based Quantum Information Processing, Collaborative Research: Quantum Criticality, Localization and Dynamics in Quasiperiodic Systems, G5757977352, Collaborative Research: Quantum Criticality, Localization and Dynamics in Quasiperiodic Systems, CAREER: Floquet Route to Non-Equilibrium Phases of Matter in Cavity QED