84 citations · 97 across the 8 of their papers we have counts for
9 papers
Transport statistics and thermoelectric performance of Hofstadters butterfly
Friedemann Queißer, Gernot Schaller
We investigate electrons subject to a magnetic field that may tunnel along a square lattice and additionally to two electronic leads. Using non-equilibrium Greens functions we eval…
Exploring bosonic bound states with parallel reaction coordinates
Guan-Yu Lai, Friedemann Queißer, Gernot Schaller
Bound states are dissipation-resilient states that may emerge when quantum systems are strongly coupled to reservoirs with band gaps. We analyze an exactly solvable bosonic model f…
Coupling-energy driven pumping through quantum dots: Role of coherences
Lukas Litzba, Gernot Schaller, Jürgen König +1
We study the impact of off-resonant tunneling and coherences on the electron pumping through quantum dots. Thereby, we focus on two electron-pump setups where lowest-order tunnelin…
Quantum Zeno effect versus adiabatic quantum computing and quantum annealing
Naser Ahmadiniaz, Dennis Kraft, Gernot Schaller +1
For the adiabatic version of Grover's quantum search algorithm as proposed by Roland and Cerf, we study the impact of decoherence caused by a rather general coupling to some enviro…
Continuous Dimer Angles on the Silicon Surface: Critical Properties and the Kibble-Zurek Mechanism
Andreas Weitzel, Gernot Schaller, Friedemann Queisser +1
Langevin dynamics simulations are used to analyze the static and dynamic properties of an {XY} model adapted to dimers forming on Si(001) surfaces. The numerics utilise high-perfor…
Relaxation to persistent currents in a Hubbard trimer coupled to fermionic baths
Nikodem Szpak, Gernot Schaller, Ralf Schützhold +1
We consider a ring of fermionic quantum sites, modeled by the Fermi--Hubbard Hamiltonian, in which electrons can move and interact strongly via the Coulomb repulsion. The system is…
Kibble-Zurek dynamics in the anisotropic Ising model of the Si(001) surface
Gernot Schaller, Friedemann Queisser, Seyedeh Parya Katoorani +8
As a simplified description of the non-equilibrium dynamics of buckled dimers on the Si(001) surface, we consider the anisotropic 2D Ising model and study the freezing of spatial c…
Floquet analysis of a superradiant many-qutrit refrigerator
Dmytro Kolisnyk, Friedemann Queisser, Gernot Schaller +1
We investigate superradiant enhancements in the refrigeration performance of a set of three-level systems that are collectively coupled to a hot and a cold thermal reservoir an…
Dynamical Casimir Effect in a Leaky Cavity at Finite Temperature
G. Schaller, R. Schützhold, G. Plunien +1
The phenomenon of particle creation within an almost resonantly vibrating cavity with losses is investigated for the example of a massless scalar field at finite temperature. A lea…