Many-body quantum systems are very hard to describe and simulate in general, since the dimension of the state space grows exponentially with the number of particles, volume, etc. Cold atomic systems may help us in that task, as one can in principle engineer the interactions among the atoms to emulate many-body quantum problems. So far, this possibility has been mainly addressed in the context of condensed matter systems, and a significant experimental effort is nowadays trying to pursue this goal. In this talk I will present some recent work where we have analyzed how to use cold atomic systems to simulate simple high energy models. In particular, I will explain how lattice (compact) QED in 2+1 dimensions, and QCD in 1+1 dimension may be simulated. Time permitting, I will also mention other efforts to describe and simulate many-body quantum systems using tensor-network techniques, as developed in the context of quantum information theory.
Quantum simulation with cold atoms: from condensed matter to highenergy models, Prof. Dr. Juan Ignacio Cirac, (Max-Planck-Institut fuer Quantenoptik)