QUROPE Quantum Information Processing and Communication in Europe

R. Blatt. (P4a OEAW.ex) talk "The Quantum Way of Doing Computations"

R. Blatt. (P4a OEAW.ex) talk "The Quantum Way of Doing Computations"

R. Blatt. (P4a OEAW.ex) talk "The Quantum Way of Doing Computations"

R. Blatt. (P4a OEAW.ex) talk "The Quantum Way of Doing Computations"

M. Dalmonte (P4b OEAW.TH) invited talk "Confinement phenomena and the cold atom lattice gauge toolbox"

M. Dalmonte (P4b OEAW.TH) talk "Confinement phenomena and the cold atom lattice gauge toolbox"

M. Dalmonte (P4b OEAW.TH) talk "Cold gas Hubbard toolbox for lattice gauge theories"

We study the driven-dissipative dynamics of photons interacting with an array of micromechanical membranes in an optical cavity. Periodic membrane driving and phonon creation result in an effective photon-number-conserving nonunitary dynamics, which features a steady state with long-range photonic coherence. If the leakage of photons out of the cavity is counteracted by incoherent driving of the photonic modes, we show that the system undergoes a dynamical phase transition to the state with long-range coherence.

We investigate dissipation-induced p-wave paired states of fermions in two dimensions and show the existence of spatially separated Majorana zero modes in a phase with vanishing Chern number. We construct an explicit and natural model of a dissipative vortex that traps a single of these modes, and establish its topological origin by mapping the problem to a chiral one-dimensional wire where we observe a nonequilibrium topological phase transition characterized by an abrupt change of a topological invariant (winding number).