135 citations · 375 across the 19 of their papers we have counts for
19 papers
Precision quantum simulation of magnon spectra and interactions
Trond I. Andersen, Nikita Astrakhantsev, Jeronimo Martinez +329
Quantum simulation promises to advance materials discovery by accurately simulating complex states of matter, their microscopic excitations, and macroscopic response functions. The…
A Heuristic for Matrix Product State Simulation of Out-of-Equilibrium Dynamics of Two-Dimensional Quantum Spin Systems
Salvatore Mandrà, Brayden Ware, Nikita Astrakhantsev +4
Out-of-equilibrium dynamics of non-integrable Hamiltonian many-body quantum systems are characterized by highly entangled wave functions. Near-maximal entanglement arises in system…
Learning complexity of many-body quantum sign structures through the lens of Boolean Fourier analysis
Ilya Schurov, Anna Kravchenko, Mikhail I. Katsnelson +2
We study sign structures of the ground states of spin- magnetic systems using the methods of Boolean Fourier analysis. Previously it was shown that the sign structures of frus…
Constructive interference at the edge of quantum ergodic dynamics
Dmitry A. Abanin, Rajeev Acharya, Laleh Aghababaie-Beni +262
Quantum observables in the form of few-point correlators are the key to characterizing the dynamics of quantum many-body systems. In dynamics with fast entanglement generation, qua…
Observation of disorder-free localization using a (2+1)D lattice gauge theory on a quantum processor
Gaurav Gyawali, Shashwat Kumar, Yuri D. Lensky +219
Disorder-induced phenomena in quantum many-body systems pose significant challenges for analytical methods and numerical simulations at relevant time and system scales. To reduce t…
Thermalization and Criticality on an Analog-Digital Quantum Simulator
Trond I. Andersen, Nikita Astrakhantsev, Amir H. Karamlou +224
Understanding how interacting particles approach thermal equilibrium is a major challenge of quantum simulators. Unlocking the full potential of such systems toward this goal requi…
Stability of a quantum skyrmion: projective measurements and the quantum Zeno effect
Fabio Salvati, Mikhail I. Katsnelson, Andrey A. Bagrov +1
Magnetic skyrmions are vortex-like quasiparticles characterized by long lifetime and remarkable topological properties. That makes them a promising candidate for the role of inform…
Implementing scalable matrix-vector products for the exact diagonalization methods in quantum many-body physics
Tom Westerhout, Bradford L. Chamberlain
Exact diagonalization is a well-established method for simulating small quantum systems. Its applicability is limited by the exponential growth of the so-called Hamiltonian matrix…
Understanding Symmetry Breaking in Twisted Bilayer Graphene from Cluster Constraints
Nikita Astrakhantsev, Glenn Wagner, Tom Westerhout +2
Twisted bilayer graphene is an exciting platform for exploring correlated quantum phases, extremely tunable with respect to both the single-particle bands and the interaction profi…
Many-body quantum sign structures as non-glassy Ising models
Tom Westerhout, Mikhail I. Katsnelson, Andrey A. Bagrov
The non-trivial phase structure of the eigenstates of many-body quantum systems severely limits the applicability of quantum Monte Carlo, variational, and machine learning methods.…
The role of correlated hopping in many-body physics of flat-band systems: Nagaoka ferromagnetism
Tom Westerhout, Mikhail I. Katsnelson
In narrow-band systems, correlated contribution to effective hopping becomes important, and one needs to carefully consider three types of hopping processes: between doubly and sin…
Plasmonic Quantum Dots in Twisted Bilayer Graphene
Tom Westerhout, Mikhail I. Katsnelson, Malte Rösner
We derive a material-realistic real-space many-body Hamiltonian for twisted bilayer graphene from first principles, including both single-particle hopping terms for electrons…
Self-organized criticality in neural networks
Mikhail I. Katsnelson, Vitaly Vanchurin, Tom Westerhout
We demonstrate, both analytically and numerically, that learning dynamics of neural networks is generically attracted towards a self-organized critical state. The effect can be mod…
lattice-symmetries: A package for working with quantum many-body bases
Tom Westerhout
Exact diagonalization (ED) is one of the most reliable and established numerical methods of quantum many-body theory. The main limiting factor of the method is the exponential scal…
Broken-Symmetry Ground States of the Heisenberg model on the Pyrochlore Lattice
Nikita Astrakhantsev, Tom Westerhout, Apoorv Tiwari +5
The spin-1/2 Heisenberg model on the pyrochlore lattice is an iconic frustrated three-dimensional spin system with a rich phase diagram. Besides hosting several ordered phases, the…
Kinetic samplers for neural quantum states
Andrey A. Bagrov, Askar A. Iliasov, Tom Westerhout
Neural quantum states (NQS) are a novel class of variational many-body wave functions that are very flexible in approximating diverse quantum states. Optimization of an NQS ansatz…
Neural Quantum States of frustrated magnets: generalization and sign structure
Tom Westerhout, Nikita Astrakhantsev, Konstantin S. Tikhonov +2
Neural quantum states (NQS) attract a lot of attention due to their potential to serve as a very expressive variational ansatz for quantum many-body systems. Here we study the main…
NetKet: A Machine Learning Toolkit for Many-Body Quantum Systems
Giuseppe Carleo, Kenny Choo, Damian Hofmann +15
We introduce NetKet, a comprehensive open source framework for the study of many-body quantum systems using machine learning techniques. The framework is built around a general and…
Plasmon confinement in fractal quantum systems
Tom Westerhout, Edo van Veen, Mikhail I. Katsnelson +1
Recent progress in the fabrication of materials has made it possible to create arbitrary non-periodic two-dimensional structures in the quantum plasmon regime. This paves the way f…