A microscope for Fermi gases (A. Omran) / Methods to observe topological properties in a fermionic ladder model (Dr. M. Burrello)
- Double Feature!
- Date: Nov 24, 2015
- Time: 02:30 PM - 04:00 PM (Local Time Germany)
- Speaker: M.Sc. Ahmed Omran, Abt. Quanten-Vielteilchensysteme / Dr. Michele Burrello, Abt. Theorie
- Room: Herbert Walther Lecture Hall
- Host: MPQ
A microscope for Fermi gases (A. Omran)
Ultracold atoms in optical lattices provide a
powerful platform for the controlled study of quantum many body
physics. The ability to resolve single atoms in optical lattices has
proven to be a powerful technique for studying strongly correlated
quantum gases of bosons, providing new insights into equilibrium physics
around quantum phase transitions, dynamical properties in the strongly
correlated regime and even allowed for the local study of entanglement
entropy. In our experiment we have recently realised a quantum gas
microscope with fermionic Li6, providing a new tool to study various
models relevant for condensed matter physics. I present our results on
studying degenerate Fermi gases and extracting thermodynamic quantities
on a single-site level.
Methods to observe topological properties in a
fermionic ladder model (Dr. M. Burrello)
The recent successes in coupling ultracold gases
to synthetic gauge potentials show the exceptional possibilities of such
setups in studying and probing many-body quantum physics. In this talk I
will review some aspects of the theory of topological phases of matter
and I will describe how synthetic magnetic fields and spin-orbit
couplings allow us to simulate topological insulators and
superconductors in optical lattices. I will focus in particular on a
ladder model of fermions which mimics a one-dimensional topological
superconductor and presents fractionalized edge modes. The physical
observables suitable for the detection of topological phases in this
system will be examined also in the presence of trapping potentials and
Hubbard interactions.