261 citations · 2.1k across the 88 of their papers we have counts for
89 papers
Simulating Quantum Physics Experiments One Event at a Time
Hans De Raedt
This text explores the fundamental divide between empirical laboratory data and continuous theoretical physics models, framing the "quantum measurement paradox" as an ontological e…
Universal Quantum Computer Simulation of 50 Qubits on Europe`s First Exascale Supercomputer Harnessing Its Heterogeneous CPU-GPU Architecture
Hans De Raedt, Jiri Kraus, Andreas Herten +5
We have developed a new version of the high-performance Jülich universal quantum computer simulator (JUQCS-50) that leverages key features of the GH200 superchips as used in the JU…
Quantum speed-up for solving the one-dimensional Hubbard model using quantum annealing
Kunal Vyas, Fengping Jin, Hans De Raedt +1
The Hubbard model has occupied the minds of condensed matter physicists for most part of the last century. This model provides insight into a range of phenomena in correlated elect…
Can foreign exchange rates violate Bell inequalities?
Hans De Raedt, Mikhail I. Katsnelson, Manpreet S. Jattana +5
The analysis of empirical data through model-free inequalities leads to the conclusion that violations of Bell-type inequalities by empirical data cannot have any significance unle…
Lindblad dynamics from spatio-temporal correlation functions in nonintegrable spin-1/2 chains with different boundary conditions
Markus Kraft, Jonas Richter, Fengping Jin +6
We investigate the Lindblad equation in the context of boundary-driven magnetization transport in spin- chains. Our central question is whether the nonequilibrium steady state…
Large-Scale Simulation of Shor's Quantum Factoring Algorithm
Dennis Willsch, Madita Willsch, Fengping Jin +2
Shor's factoring algorithm is one of the most anticipated applications of quantum computing. However, the limited capabilities of today's quantum computers only permit a study of S…
Einstein-Podolsky-Rosen-Bohm experiments: a discrete data driven approach
Hans De Raedt, Mikhail I. Katsnelson, Manpreet S. Jattana +5
We take the point of view that building a one-way bridge from experimental data to mathematical models instead of the other way around avoids running into controversies resulting f…
Spin-1/2 XXZ chain coupled to two Lindblad baths: Constructing nonequilibrium steady states from equilibrium correlation functions
Tjark Heitmann, Jonas Richter, Fengping Jin +7
State-of-the-art approaches to extract transport coefficients of many-body quantum systems broadly fall into two categories: (i) they target the linear-response regime in terms of…
Model-free inequality for data of Einstein-Podolsky-Rosen-Bohm experiments
Hans De Raedt, Mikhail I. Katsnelson, Manpreet S. Jattana +5
We present a new inequality constraining correlations obtained when performing Einstein-Podolsky-Rosen-Bohm experiments. The proof does not rely on mathematical models that are ima…
On the fragility of gate-error metrics in simulation models of flux-tunable transmon quantum computers
Hannes Lagemann, Dennis Willsch, Madita Willsch +3
Constructing a quantum computer requires immensely precise control over a quantum system. A lack of precision is often quantified by gate-error metrics, such as the average infidel…
Classical, quantum and event-by-event simulation of a Stern-Gerlach experiment with neutrons
Hans De Raedt, Fengping Jin, Kristel Michielsen
We present a comprehensive simulation study of the Newtonian and quantum model of a Stern-Gerlach experiment with cold neutrons.By solving Newton's equation of motion and the time-…
Spatiotemporal dynamics of classical and quantum density profiles in low-dimensional spin systems
Tjark Heitmann, Jonas Richter, Fengping Jin +3
We provide a detailed comparison between the dynamics of high-temperature spatiotemporal correlation functions in quantum and classical spin models. In the quantum case, our large-…
On the hardness of quadratic unconstrained binary optimization problems
Vrinda Mehta, Fengping Jin, Kristel Michielsen +1
We use exact enumeration to characterize the solutions of quadratic unconstrained binary optimization problems of less than 21 variables in terms of their distributions of Hamming…
Sustaining Rabi oscillations by using a phase-tunable image drive
H. De Raedt, S. Miyashita, K. Michielsen +3
Recent electron spin resonance experiments on CaWO:Gd and on other magnetic impurities have demonstrated that sustained Rabi oscillations can be created by driving a mag…
Improved variational quantum eigensolver via quasi-dynamical evolution
Manpreet Singh Jattana, Fengping Jin, Hans De Raedt +1
The variational quantum eigensolver (VQE) is a hybrid quantum-classical algorithm designed for current and near-term quantum devices. Despite its initial success, there is a lack o…
Quantum annealing for hard 2-SAT problems : Distribution and scaling of minimum energy gap and success probability
Vrinda Mehta, Fengping Jin, Hans De Raedt +1
In recent years, quantum annealing has gained the status of being a promising candidate for solving various optimization problems. Using a set of hard 2-satisfiabilty (2-SAT) probl…
Assessment of the variational quantum eigensolver: application to the Heisenberg model
Manpreet Singh Jattana, Fengping Jin, Hans De Raedt +1
We present and analyze large-scale simulation results of a hybrid quantum-classical variational method to calculate the ground state energy of the anti-ferromagnetic Heisenberg mod…
Numerical analysis of effective models for flux-tunable transmon systems
Hannes Lagemann, Dennis Willsch, Madita Willsch +3
Simulations and analytical calculations that aim to describe flux-tunable transmons are usually based on effective models of the corresponding lumped-element model. However, when a…
Benchmarking Advantage and D-Wave 2000Q quantum annealers with exact cover problems
Dennis Willsch, Madita Willsch, Carlos D. Gonzalez Calaza +4
We benchmark the quantum processing units of the largest quantum annealers to date, the 5000+ qubit quantum annealer Advantage and its 2000+ qubit predecessor D-Wave 2000Q, using t…
GPU-accelerated simulations of quantum annealing and the quantum approximate optimization algorithm
Dennis Willsch, Madita Willsch, Fengping Jin +2
We study large-scale applications using a GPU-accelerated version of the massively parallel Jülich universal quantum computer simulator (JUQCS--G). First, we benchmark JUWELS Boost…
Experimental protection of quantum coherence by using a phase-tunable image drive
Sylvain Bertaina, Hervé Vezin, Hans De Raedt +1
The protection of qubit coherence is an essential task in order to build a practical quantum computer able to manipulate, store and read quantum information with a high degree of f…
Benchmarking Supercomputers with the Jülich Universal Quantum Computer Simulator
Dennis Willsch, Hannes Lagemann, Madita Willsch +3
We use a massively parallel simulator of a universal quantum computer to benchmark some of the most powerful supercomputers in the world. We find nearly ideal scaling behavior on t…
Real-Time Dynamics of Typical and Untypical States in Non-Integrable Systems
Jonas Richter, Fengping Jin, Hans De Raedt +3
For a class of typical states, the real-time and real-space dynamics of non-equilibrium density profiles has been recently studied for integrable models, i.e. the spin-1/2 XXZ chai…
Antiferromagnetic order without recourse to staggered fields
H. C. Donker, H. De Raedt, M. I. Katsnelson
In the theory of antiferromagnetism, the staggered field---an external magnetic field that alternates in sign on atomic length scales---is used to select the classical Néel state f…