Regensburg 2025 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 43: Correlated Electrons: Other Theoretical Topics

TT 43.12: Talk

Thursday, March 20, 2025, 12:30–12:45, H33

Nonlinear effects on the transport of fractional charges in quantum wires — •Imke Schneider¹, Flavia Braga Ramos¹, Rodrigo Gonçalves Pereira², and Sebastian Eggert¹ — ¹Physics Department and Research Center OPTIMAS, University of Kaiserslautern-Landau, Kaiserslautern, Germany — ²International Institute of Physics and Departamento de Física Teórica e Ex- perimental, Universidade Federal do Rio Grande do Norte, Natal, Brazil

We investigate the transport properties of one-dimensional systems be- yond linear response, focusing on the fractionalization of propagating charges. Starting from a right-moving unit charge, we predict its evo- lution into at least three distinct stable parts: a fractionally charged particle with freeparticle dynamics, a left-moving signal, and a right- moving low-energy excitation, which can carry positive or negative charge depending on the interaction strength and energy regime. Our findings provide deep insights into the universal correlated nature of these emergent particles and pave the way for out-of-equilibrium transport measurements, offering a direct method to extract the interaction parameters governing correlations in the system.

Keywords: charge fractionalization; non-equilibrium dynamics; transport; one-dimensional systems; nonlinear Luttinger Liquid theory