5 papers
Quantum Phase Transitions for Bosons in One Dimension
Reinhard Baltin, Karl-Heinz Wagenblast
We study the ground state phase diagram and the critical properties of interacting Bosons in one dimension by means of a quantum Monte Carlo technique. The direct experimental real…
The Superconductor-Insulator Transition in a Tunable Dissipative Environment
Karl-Heinz Wagenblast, Anne van Otterlo, Gerd Schoen +1
We study the influence of a tunable dissipative environment on the dynamics of Josephson junction arrays near the superconductor-insulator transition. The experimental realization…
Flux Noise near the Berezinskii-Kosterlitz-Thouless Transition
Karl-Heinz Wagenblast, Rosario Fazio
We study the flux noise in Josephson junction arrays in the critical regime above the Berezinskii-Kosterlitz-Thouless transition. In proximity coupled arrays a local ohmic damping…
New Universality Class at the Superconductor--Insulator Transition
Karl-Heinz Wagenblast, Anne van Otterlo, Gerd Schön +1
We study dynamic properties of thin films near the superconductor - insulator transition. We formulate the problem in a phase representation. The key new feature of our model is th…
Quantum-Phase Transitions of Interacting Bosons and the Supersolid Phase
Anne van Otterlo, Karl-Heinz Wagenblast, Reinhard Baltin +3
We investigate the properties of strongly interacting bosons in two dimensions at zero temperature using mean-field theory, a variational Ansatz for the ground state wave function,…