222 citations · 2k across the 49 of their papers we have counts for
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Avoided crossings in spin-boson systems: consequences for adiabatic state preparation
Joona Marjamäki, Robert van Leeuwen, Riku Tuovinen
Avoided crossings in the correlated many-body spectrum play a central role in determining the conditions for adiabatic state preparation in interacting quantum systems. We investig…
Revealing symmetries in quantum computing for many-body systems
Robert van Leeuwen
We develop a method to deduce the symmetry properties of many-body Hamiltonians when they are prepared in Jordan-Wigner form for evaluation on quantum computers. Symmetries, such a…
Geometry of Degeneracy in Potential and Density Space
Markus Penz, Robert van Leeuwen
In a previous work [J. Chem. Phys. 155, 244111 (2021)], we found counterexamples to the fundamental Hohenberg-Kohn theorem from density-functional theory in finite-lattice systems…
Density-Functional Theory on Graphs
Markus Penz, Robert van Leeuwen
The principles of density-functional theory are studied for finite lattice systems represented by graphs. Surprisingly, the fundamental Hohenberg-Kohn theorem is found void in gene…
Quantum Control of Many-Body Systems by the Density
S. E. B. Nielsen, M. Ruggenthaler, R. van Leeuwen
In this work we focus on a recently introduced method [1] to construct the external potential that, for a given initial state, produces a prescribed time-dependent density in a…
Density-potential mappings in quantum dynamics
M. Ruggenthaler, K. J. H Giesbertz, M. Penz +1
In a recent letter [Europhys. Lett. 95, 13001 (2011)] the question of whether the density of a time-dependent quantum system determines its external potential was reformulated as a…