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TT: Fachverband Tiefe Temperaturen

TT 3: Correlated Electrons: Low-Dimensional Systems - Models 1

TT 3.2: Vortrag

Montag, 11. März 2013, 09:45–10:00, H9

Luttinger liquid universality in the time evolution after an interaction quenchChristoph Karrasch1, Jan Rentrop2, •Dirk Schuricht2, and Volker Meden21Department of Physics, University of California — 2Institute for Theory of Statistical Physics, RWTH Aachen University

We provide evidence that the relaxation dynamics of one-dimensional, metallic Fermi systems resulting out of an abrupt amplitude change of the two-particle interaction has aspects which are universal in the Luttinger liquid sense: The leading long-time behavior of certain observables is described by universal functions of the equilibrium Luttinger liquid parameter and the renormalized velocity. We analytically derive those functions for the Tomonaga-Luttinger model and verify our hypothesis of universality by considering spinless lattice fermions within the framework of the density matrix renormalization group.
[1] C. Karrasch et al., Phys. Rev. Lett. 109, 126406 (2012).

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DPG-Physik > DPG-Verhandlungen > 2013 > Regensburg