Parametric Instabilities of Interacting Bosons in Periodically Driven 1D Optical Lattices

February 11, 2020

New states of matter can arise when a system is exposed to a periodic drive, such as by irradiating a solid with light or by mechanically shaking a gas of ultracold atoms. While experiments have validated this method, the target often exhibits a drastically reduced lifetime because it continuously absorbs energy from the drive. Moreover, in systems of bosonic particles the periodic drive can trigger the rapid growth of collective excitations, known as parametric instabilities, which typically decay and result in additional heating. Here, ...

Time-resolved observation of spin-charge deconfinement in fermionic Hubbard chains

January 10, 2020

Elementary particles carry several quantum numbers, such as charge and spin. However, in an ensemble of strongly interacting particles, the emerging degrees of freedom can fundamentally differ from those of the individual constituents. For example, one-dimensional systems are described by independent quasiparticles carrying either spin (spinon) or charge (holon). Here, we report on the dynamical deconfinement of spin and charge excitations in real space after the removal of a particle in Fermi-Hubbard chains of ultracold atoms.

Bharath and Cesar receive Marie Skłodowska Curie Post-doctoral Research Fellowships

February 06, 2020

Dr. Bharath Hebbe Madhusudhana and Dr. Cesar Cabrera have been awarded a Marie Skłodowska Curie Individual Fellowship under the Horizon 2020 program.

Congratulations to both!

Many-Body Delocalization in the Presence of a Quantum Bath

October 18, 2019

Some isolated quantum systems with disordered potentials fail to ever reach thermal equilibrium, a phenomenon known as many-body localization (MBL). An outstanding question concerns the stability of this phenomenon. While it is well known that exposing the quantum system to the outside world destroys localization, it is not clear what happens when the MBL system is connected to another small quantum system known as a quantum bath. Does a quantum bath destroy the localization, and if so, how small can that bath be?


Group Seminar at LMU: Collisionally inhomogeneous matter waves

February 18, 2020

Elmar Haller, University of Strathclyde
LMU München
Schellingstr. 4, Seminar room H 107
80799 München
Tuesday, February 18, at 9.15 a.m.

Theory Seminar at LMU: Topological two-body bound states

February 17, 2020

Marco Di Liberto, Université Libre de Bruxelles, Brussels
LMU München
Theresienstrasse 37, Room A 449
80333 München
Monday, February 17, at 2 p.m.

Solid State Theory Seminar at LMU: Zooming in on Ultracold Few-Fermion Systems

February 14, 2020

Philipp Preiss, Heidelberg University, Germany
LMU München
Theresienstr. 37, IV, Room A 450
80333 Munich
Friday, February 14, at 9 a.m.

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