89 citations · 436 across the 17 of their papers we have counts for
17 papers
Performance analysis of classical adiabatic annealing on Ising machines
Jacob Lamers, Guy Verschaffelt, Guy Van der Sande
Ising machines are a promising approach to solve combinatorial optimization problems. They map these problems onto the Ising model and search for low-energy configurations. However…
Beyond Gradient Descent: Adam for Analog Ising Machines
Stijn Van Vooren, Guy Van der Sande, Guy Verschaffelt
As Moore's law reaches its limits, Ising machines offer a promising alternative computing approach for difficult optimization problems. However, many analog, time-continuous Ising…
Reducing hyperparameter sensitivity in measurement-feedback based Ising machines
Toon Sevenants, Guy Van der Sande, Guy Verschaffelt
Analog Ising machines have been proposed as heuristic hardware solvers for combinatorial optimization problems, with the potential to outperform conventional approaches, provided t…
Predicting the optimal noise strength for solving optimization problems with analog Ising machines
Leen Mys, Guy Verschaffelt, Guy Van der Sande
Analog Ising machines are dedicated hardware solvers designed to solve NP hard optimization problems. However, the global optimum is often not found as the system gets stuck in loc…
How to Incorporate External Fields in Analog Ising Machines
Robbe De Prins, Jacob Lamers, Peter Bienstman +3
Ising machines (IMs) are specialized devices designed to efficiently solve combinatorial optimization problems (COPs). They consist of artificial spins that evolve towards a low-en…
Roadmap on Neuromorphic Photonics
Daniel Brunner, Bhavin J. Shastri, Mohammed A. Al Qadasi +147
This roadmap consolidates recent advances while exploring emerging applications, reflecting the remarkable diversity of hardware platforms, neuromorphic concepts, and implementatio…
Requirements on bit resolution in optical Ising machine implementations
Toon Sevenants, Guy Van der Sande, Guy Verschaffelt
Optical Ising machines have emerged as a promising dynamical hardware solver for computational hard optimization problems. These Ising machines typically require an optical modulat…
Using continuation methods to analyse the difficulty of problems solved by Ising machines
Jacob Lamers, Guy Verschaffelt, Guy Van der Sande
Ising machines are dedicated hardware solvers of NP-hard optimization problems. However, they do not always find the most optimal solution. The probability of finding this optimal…
Noise-injected analog Ising machines enable ultrafast statistical sampling and machine learning
Fabian Böhm, Diego Alonso-Urquijo, Guy Verschaffelt +1
Ising machines are a promising non-von-Neumann computational concept for neural network training and combinatorial optimization. However, while various neural networks can be imple…
Order-of-magnitude differences in computational performance of analog Ising machines induced by the choice of nonlinearity
Fabian Böhm, Thomas Van Vaerenbergh, Guy Verschaffelt +1
Ising machines based on nonlinear analog systems are a promising method to accelerate computation of NP-hard optimization problems. Yet, their analog nature is also causing amplitu…
Distributed Kerr Nonlinearity in a Coherent All-Optical Fiber-Ring Reservoir Computer
Jaël Pauwels, Guy Verschaffelt, Serge Massar +1
We investigate, both numerically and experimentally, the usefulness of a distributed nonlinearity in a passive coherent photonic reservoir computer. This computing system is based…
Demonstrating Delay-based Reservoir Computing Using a Compact Photonic Integrated Chip
Krishan Harkhoe, Guy Verschaffelt, Andrew Katumba +2
Photonic delay-based reservoir computing (RC) has gained considerable attention lately, as it allows for simple technological implementations of the RC concept that can operate at…
Semiconductor Ring Lasers Coupled by a Single Waveguide
W. Coomans, L. Gelens, G. Van der Sande +4
We experimentally and theoretically study the characteristics of semiconductor ring lasers bidirectionally coupled by a single bus waveguide. This configuration has, e.g., been sug…
Excitability in optical systems close to Z2-symmetry
Stefano Beri, Lilia Mashall, Lendert Gelens +5
We report theoretically and experimentally on excitability in semiconductor ring lasers in order to reveal a mechanism of excitability, general for systems close to Z2-symmetry. Th…
Excitability in semiconductor microring lasers: Experimental and theoretical pulse characterization
L. Gelens, L. Mashal, S. Beri +4
We characterize the operation of semiconductor microring lasers in an excitable regime. Our experiments reveal a statistical distribution of the characteristics of noise-triggered…
Topological insight into the non-Arrhenius mode hopping of semiconductor ring lasers
S. Beri, L. Gelens, M. Mestre +6
We investigate both theoretically and experimentally the stochastic switching between two counter-propagating lasing modes of a semiconductor ring laser. Experimentally, the reside…
Exploring multi-stability in semiconductor ring lasers: theory and experiment
L. Gelens, S. Beri, G. Van der Sande +4
We report the first experimental observation of multi-stable states in a single-longitudinal mode semiconductor ring laser. We show how the operation of the device can be steered t…