131 citations · 421 across the 20 of their papers we have counts for
20 papers
Measurement-driven Quantum Approximate Optimization
Tobias Stollenwerk, Stuart Hadfield
Algorithms based on non-unitary evolution have attracted much interest for ground state preparation on quantum computers. One recently proposed method makes use of ancilla qubits a…
Quantum combinatorial optimization beyond the variational paradigm: simple schedules for hard problems
Tim Bode, Krish Ramesh, Tobias Stollenwerk
Advances in quantum algorithms suggest a tentative scaling advantage on certain combinatorial optimization problems. Recent work, however, has also reinforced the idea that barren…
Warm Start of Variational Quantum Algorithms for Quadratic Unconstrained Binary Optimization Problems
Yahui Chai, Karl Jansen, Stefan Kühn +2
Variational Quantum Eigensolver (VQE) is widely used in near-term hardware. However, their performances remain limited by the poor trainability and are dependent on random paramete…
Quantum-Inspired Fluid Simulation of 2D Turbulence with GPU Acceleration
Leonhard Hölscher, Pooja Rao, Lukas Müller +4
Tensor network algorithms can efficiently simulate complex quantum many-body systems by utilizing knowledge of their structure and entanglement. These methodologies have been adapt…
Measurement-Based Quantum Approximate Optimization
Tobias Stollenwerk, Stuart Hadfield
Parameterized quantum circuits are attractive candidates for potential quantum advantage in the near term and beyond. At the same time, as quantum computing hardware not only conti…
Quantum Computing Enhanced Service Ecosystem for Simulation in Manufacturing
Wolfgang Maass, Ankit Agrawal, Alessandro Ciani +14
Quantum computing (QC) and machine learning (ML), taken individually or combined into quantum-assisted ML (QML), are ascending computing paradigms whose calculations come with huge…
Mean-Field Approximate Optimization Algorithm
Aditi Misra-Spieldenner, Tim Bode, Peter K. Schuhmacher +3
The Quantum Approximate Optimization Algorithm (QAOA) is suggested as a promising application on early quantum computers. Here, a quantum-inspired classical algorithm, the mean-fie…
Towards Finding an Optimal Flight Gate Assignment on a Digital Quantum Computer
Yahui Chai, Lena Funcke, Tobias Hartung +4
We investigate the performance of the variational quantum eigensolver (VQE) for the optimal flight gate assignment problem. This problem is a combinatorial optimization problem tha…
Diagrammatic Analysis for Parameterized Quantum Circuits
Tobias Stollenwerk, Stuart Hadfield
Diagrammatic representations of quantum algorithms and circuits offer novel approaches to their design and analysis. In this work, we describe extensions of the ZX-calculus especia…
Withdrawn: A Measurement-based Algorithm for Graph Colouring
Michael Epping, Tobias Stollenwerk
In a previous version of this document we misinterpreted the runtime of a part of the described algorithm. Indeed, the runtime is not better than the Grover-Algorithm. We therefor…
Performance of Domain-Wall Encoding for Quantum Annealing
Jie Chen, Tobias Stollenwerk, Nicholas Chancellor
In this paper we experimentally test the performance of the recently proposed domain-wall encoding of discrete variables from [Chancellor Quantum Sci. Technol. 4 045004] on Ising m…
Embedding of Complete Graphs in Broken Chimera Graphs
Elisabeth Lobe, Lukas Schürmann, Tobias Stollenwerk
In order to solve real world combinatorial optimization problems with a D-Wave quantum annealer it is necessary to embed the problem at hand into the D-Wave hardware graph, namely…
Image Acquisition Planning for Earth Observation Satellites with a Quantum Annealer
Tobias Stollenwerk, Vincent Michaud, Elisabeth Lobe +3
We present a comparison study of state-of-the-art classical optimisation methods to a D-Wave 2000Q quantum annealer for the planning of Earth observation missions. The problem is t…
Performance of a Quantum Annealer for Ising Ground State Computations on Chimera Graphs
Michael Juenger, Elisabeth Lobe, Petra Mutzel +4
Quantum annealing is getting increasing attention in combinatorial optimization. The quantum processing unit by D-Wave is constructed to approximately solve Ising models on so-call…
Flight Gate Assignment with a Quantum Annealer
Tobias Stollenwerk, Elisabeth Lobe, Martin Jung
Optimal flight gate assignment is a highly relevant optimization problem from airport management. Among others, an important goal is the minimization of the total transit time of t…
TiGL - An Open Source Computational Geometry Library for Parametric Aircraft Design
Martin Siggel, Jan Kleinert, Tobias Stollenwerk +1
This paper introduces the software TiGL: TiGL is an open source high-fidelity geometry modeler that is used in the conceptual and preliminary aircraft and helicopter design phase.…
Quantum Annealing Applied to De-Conflicting Optimal Trajectories for Air Traffic Management
Tobias Stollenwerk, Bryan O'Gorman, Davide Venturelli +6
We present the mapping of a class of simplified air traffic management (ATM) problems (strategic conflict resolution) to quadratic unconstrained boolean optimization (QUBO) problem…
Theory of Curie temperature enhancement in electron-doped EuO
Tobias Stollenwerk, Johann Kroha
We present a comparative, theoretical study of the doping dependence of the critical temperature of the ferromagnetic insulator-metal transition in Gd-doped and O-deficient E…
Thickness-dependent magnetic properties of oxygen-deficient EuO
M. Barbagallo, T. Stollenwerk, J. Kroha +12
We have studied how the magnetic properties of oxygen-deficient EuO sputtered thin films vary as a function of thickness. The magnetic moment, measured by polarized neutron reflect…
Efficient construction of maximally localized photonic Wannier functions: locality criterion and initial conditions
Tobias Stollenwerk, Dmitry N. Chigrin, Johann Kroha
Wannier function expansions are well suited for the description of photonic- crystal-based defect structures, but constructing maximally localized Wannier functions by optimizing t…