21 citations · 87 across the 9 of their papers we have counts for
10 papers
Optimization of Algorithmic Errors in Analog Quantum Simulations
Nikita A. Zemlevskiy, Henry F. Froland, Stephan Caspar
Analog quantum simulation is emerging as a powerful tool for uncovering classically unreachable physics such as many-body real-time dynamics. A complete quantification of uncertain…
Preparation for Quantum Simulation of the 1+1D O(3) Non-linear σ-Model using Cold Atoms
Anthony N. Ciavarella, Stephan Caspar, Hersh Singh +1
The 1+1D O(3) non-linear σ-model is a model system for future quantum lattice simulations of other asymptotically-free theories, such as non-Abelian gauge theories. We find that ut…
State Preparation in the Heisenberg Model through Adiabatic Spiraling
Anthony N. Ciavarella, Stephan Caspar, Marc Illa +1
An adiabatic state preparation technique, called the adiabatic spiral, is proposed for the Heisenberg model. This technique is suitable for implementation on a number of quantum si…
Simulating Heisenberg Interactions in the Ising Model with Strong Drive Fields
Anthony N. Ciavarella, Stephan Caspar, Hersh Singh +2
The time-evolution of an Ising model with large driving fields over discrete time intervals is shown to be reproduced by an effective XXZ-Heisenberg model at leading order in the i…
From asymptotic freedom to vacua: Qubit embeddings of the O(3) nonlinear model
Stephan Caspar, Hersh Singh
Conventional lattice formulations of vacua in the -dimensional nonlinear sigma model suffer from a sign problem. Here, we construct the first sign-problem-fr…
Nematic Confined Phases in the Quantum Link Model on a Triangular Lattice: An Opportunity for Near-Term Quantum Computations of String Dynamics on a Chip
D. Banerjee, S. Caspar, F. -J. Jiang +2
The quantum link model on the triangular lattice has two rotation-symmetry-breaking nematic confined phases. Static external charges are connected by confining strings consi…
Meron- and Semi-Vortex-Clusters as Physical Carriers of Topological Charge and Vorticity
Wolfgang Bietenholz, João C. Pinto Barros, Stephan Caspar +2
In O() non-linear -models on the lattice, the Wolff cluster algorithm is based on rewriting the functional integral in terms of mutually independent clusters. Through improve…
Doubled Lattice Chern-Simons-Yang-Mills Theories with Discrete Gauge Group
Stephan Caspar, David Mesterházy, Therkel Z. Olesen +2
We construct doubled lattice Chern-Simons-Yang-Mills theories with discrete gauge group in the Hamiltonian formulation. Here, these theories are considered on a square spatial…
Dissipative Bose-Einstein condensation in contact with a thermal reservoir
Stephan Caspar, Florian Hebenstreit, David Mesterházy +1
We investigate the real-time dynamics of open quantum spin- or hardcore boson systems on a spatial lattice, which are governed by a Markovian quantum master equation. We deriv…
Dynamics of dissipative Bose-Einstein condensation
Stephan Caspar, Florian Hebenstreit, David Mesterházy +1
We resolve the real-time dynamics of a purely dissipative quantum spin or, equivalently, hard-core boson model on a hypercubic -dimensional lattice. The considered qua…