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Non-equilibrium Dynamics of Low-dimensional Electronic Systems (5756)

January 12, 2015 – January 15, 2015

Location: Leipzig, Germany

Organizers
Bernd Rosenow, University of Leipzig
Natan Andrei, Rutgers University
Yuval Gefen, Weizmann Institute

Overview

Recent experimental and theoretical progress provides new insights into the non-equilibrium dynamics of low-dimensional electronic systems and at the same time drives new research directions. In particular, the development of new spectroscopic methods involving localized resonant levels has made possible the measurement of non-equilibrium electron distribution functions in Luttinger liquids. In addition, a new generation of high-sensitivity cryo-amplifiers allows the detection of current noise with unprecedented accuracy, providing insight into interferometric entanglement and into the dynamics of charge fractionalization. Recent progress in terahertz technology has made the creation of intense pulses with high peak electric fields feasible, allowing for the non-thermal control of material properties by optical means, and paving the way to the observation of the Higgs (amplitude) mode in a BCS superconductor. The preparation of dipolar molecules in an optical lattice in the quantum regime has recently allowed to study coherent spin dynamics in a non-equilibrium environment. On the theoretical side, these experimental advances are complemented by the development of the non-perturbative method of non-equilibrium bosonization, which allows for full treatment of both interactions and single fermion scattering processes.

The above described discoveries will drive the questions and discussions for the proposed workshop, and the collaboration between experts from these different but related areas promises synergies for the understanding of non-equilibrium dynamics of low-dimensional electronic systems. For example, non-equilibrium bosonization can be applied to Luttinger liquids, edge states, carbon nanotubes and quantum dots. Specifically, the topics to be covered include

• non-equilibrium in correlated electron systems like Luttinger liquids, topological insulator and quantum Hall insulator edges, carbon nanotubes, possibly coupled to quantum dots
• magnetism out of equilibrium
• decoherence/dephasing in the presence of strong correlations
• non-equilibrium superconductivity
• counting statistics and fluctuation theorems applied to electronic systems
• emergent neutral edge modes and edge reconstruction due to interaction effects
• equilibration on the edge

The focus of the proposed workshop is very different from that of two recent ICAM workshops on i) Non-equilibrium Bosons: From Driven Condensates to Non-linear Optics, ICTP Trieste, August 2013, and ii) Strongly Interacting Quantum Systems Out of Equilibrium, Les Houches August 2012. The main focus of i) was on cavity electrodynamics and polariton condensates, clearly different from the present one. The focus of ii) was on non-equilibrium correlation effects in a wide range of systems from cold atoms, nanoscience and materials physics to the quark-gluon plasma and the early universe. On the other hand, the present proposal has a focus on interacting fermions in low dimensions, with an emphasis on the recent discoveries described above, very different from ii).



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