
Quinten MortierPhd Student

Markus HauruPostdoc

Tom VieijraPhd Student

Jacopo de NardisPostdoc

Andrew HallamPostdoc

Laurens LootensPhd Student

Gert VercleyenPhd Student

Matthias BalPhD student

Laurens VanderstraetenPostdoc

Karel Van AcoleyenPostdoc

Jutho HaegemanProfessor

Robijn VanhovePhD student

Benoît TuybensPhD student

Nele CallebautFWO postdoc

Volkher ScholzPostdoc  former member of our research group at Ghent University

Jos VandoorsselaerePostdoc  former member of our research group at Ghent University

Bram VanheckePhD student

Alexis SchottePhd student

Frank VerstraeteProfessor

Klaas GunstPhD student

Stijn De BaerdemackerPostdoc

Gertian RoosePhD student

Maarten Van DammePhD student

Jonas VerhellenPhD student
Quinten Mortier
office: 120 032
Tel: +32 – (0)9 – 264 45 19
Research interests:
Markus Hauru
office: 120 005
Tel: +32 – (0)9 – 264 49 76
Research Interests:
I work on tensor network methods for manybody physics, especially in relation to realspace renormalization group transformations and decoherence.
Tom Vieijra
office: 120 032
Tel: +32 – (0)9 – 264 45 19
Research Interests:
Jacopo de Nardis
office: 120 005
Tel: +32 – (0)9 – 264 48 38
Research interests:
Andrew Hallam
office: 120 005
Tel: +32 – (0)9 – 264 49 71
Research Interests:
Laurens Lootens
office: 120 005
Tel: +32 – (0)9 – 264 49 76
Research Interests:
Gert Vercleyen
office: 120 005
Tel: +32 – (0)9 – 264 49 76
Research Interests:
My research interests lie on the interface between mathematics and
physics. At the moment I am working on the following topics:
 Integrability
 Quantum Groups
 Hopf Algebras and the Bethe ansatz and
the role tensor networks play in these subjects  The interplay between tensor networks and category theory
Matthias Bal
office: 120 005
Tel: +32 – (0)9 – 264 49 76
Research interests:
Tensor networks and realspace renormalization
Laurens Vanderstraeten
laurens.vanderstraeten@ugent.be
office: 120 005
Tel: +32 – (0)9 – 264 48 38
Research interests:
Matrix product states and tangentspace methods
Lowenergy dynamics of quantum spin chains
Projected entangledpair states: ground states and excitations
Karel Van Acoleyen
office: 120 005
Tel: +32 – (0)9 – 264 47 62
Teaching:
Theory of relativity
Theory of relativity and classical fields
Jutho Haegeman
office: 120 005
Tel: +32 – (0)9 – 264 49 71
Research:
I am interested in strongly correlated quantum many body systems and exotic phenomena in quantum condensed matter physics. My research focusses on studying these systems using the formalism of tensor networks, which offer a faithful description of lowenergy quantum many body states, as motivated by the area law scaling of entanglement entropy. On the one hand, tensor network states enable accurate abinitio simulations of the lowenergy properties of strongly interacting Hamiltonians, while on the other they allow us to tackle general questions from the wave function point of view, irrespective of the details of any Hamiltonian or Lagrangian. Tensor network states also provide an interesting new perspective to holography and quantum gravity.
Google Scholar — arXiv — PhD thesis — Github
Teaching:
I am currently teaching a course in Electromagnetism (2nd Bachelor Physics and Astronomy, UGent)
Personal:
Robijn Vanhove
office: 120 005
Tel: +32 – (0)9 – 264 49 76
Research interests:
Tensor network theory for topological order
Symmetry protected topological order phase detection with tensor networks
Anomalies in condensed matter systems
Numerical simulation with projected entangled pair states
Benoît Tuybens
office: 120.032
Tel: +32 – (0)9 – 264 45 19
Research interests:
Entanglement for gauge theories (and QFTs)
Continous tensor network states (cMPS and cMERA) for QFTs
Quenches (real time evolution) in QFTs (for example Schwinger model) using timedependent cMPS ansatz
Nele Callebaut
office: 120 033
Tel: +32 – (0)9 – 264 96 58
Research interests:
AdS/CFT In particular lately: AdS3/CFT2, relation to tensor networks, kinematic space, etc
Entanglement in holography
Volkher Scholz
Research interests:
My research area is quantum information science, an interdisciplinary field at the interface of physics, mathematics and computer science. I focus on establishing links between theoretical physics, mathematics — especially functional analysis and infinite dimensional algebra — and theoretical computer science in order to gain new insights into the nature of quantum mechanical systems. Apart from scientific curiosity, one of my prime motivations is to propose new techniques for information processing.
My multidisciplinary contributions range from areas within theoretical physics such as quantum field theories or transport properties of lattice systems to topics within theoretical computer science such as quantum cryptography or noncommutative optimization as well as to mathematical questions related to the theory of operator algebras and operator spaces.
In my current research, I focus on improving our understanding of quantum systems with infinitely many degrees of freedom. Examples of such systems are quantum field theories or more generally quantum systems which are described by infinitedimensional Hilbert spaces, like photonic systems.
Jos Vandoorsselaere
Research interests:
Magnetic field induced effects in gauge and condensed matter theories
Bram Vanhecke
office: 120 005
Tel: +32 – (0)9 – 264 49 76
Research interests:
I study classical lattice and quantum gauge theory, making use of various tensor network techniques.
Alexis Schotte
bureau: 120 005
Tel: +32 – (0)9 – 264 49 76
Research interests:
Anyons and topological order
Topological quantum computing and error correcting codes
Frank Verstraete
office: 120 006
Tel: +32 – (0)9 – 264 48 02
research interests:
Quantum Information Theory and the Theory of Entanglement
Strongly Correlated Quantum Systems and their Numerical Simulation
Linear and Multilinear Algebra
Klaas Gunst
office: 120 005
Tel: +32 – (0)9 – 264 49 76
Research interests:
The application of tensor networks on quantum chemical systems
Stijn De Baerdemacker
office: 120.005
Tel: +32 – (0)9 – 264 48 38
Research interests
(Quantum) manybody systems, large & small
Our world is experiencing a paradigm shift due to ever larger High Performance Computing (HPC) facilities and a growing lake of numerical & experimental data. Nevertheless, despite growing computational recourses, some manybody systems persist to elude us. Think about the highTc superconductors, or large complex (bio)molecules involving multiple transitionmetal agents. These systems are typically characterized by a large degree of quantum correlations which cannot be captured with conventional approaches. It is clear that we are missing crucial ingredients at the fundamental quantum level. My research is to find these crucial ingredients, and build computationally efficient quantum manybody theories around it.
Currently, a major theme in my research is to go “beyond integrability”. Conventional quantum manybody methods start from uncorrelated quantum states upon which quantum correlations are subsequently built in. However more symmetric than their nonintegrable counterparts, integrable systems often have these strong quantum correlations naturally built in. Thanks to many theorems in integrability (Gaudin, Slavnov, Borchardt, …) it is possible to go one step beyond uncorrelated basis’ and use the
I have given a series of lectures at CEA Saclay of which my lecture notes can be found on http://users.ugent.be/~sdbaerde/saclaylectures.html
Recent papers on this subject can be found here:
A new meanfield method suitable for strongly correlated electrons: computationally facile antisymmetric products of nonorthogonal geminals
Peter Limacher, Paul Ayers, Paul Johnson, Stijn De Baerdemacker, Dimitri Van Neck, Patrick Bultinck
Journal of Chemical Theory and Computation 9, 1394 (2013)
[doi:10.1021/ct300902c]
Efficient description of strongly correlated electrons with meanfield cost
Katharina Boguslawski, Pavel Tecmer, Paul Ayers, Patrick Bultinck, Stijn De Baerdemacker, Dimitri Van Neck
Physical Review B89, 201106 (2014)
[doi:10.1103/PhysRevB.89.201106]
A variational method for integrabilitybreaking RichardsonGaudin models
Pieter Claeys, JeanSebastien Caux, Dimitri Van Neck, Stijn De Baerdemacker
[arXiv:1707.06793] orcid nr: 0000000179333227
Gertian Roose
office: 120 032
Tel: +32 – (0)9 – 264 45 19
Research interests:
Dynamical mass generation in the GrossNeveu model using tensor network methods
Maarten Van Damme
office: 120 005
Tel: +32 – (0)9 – 264 49 76
Research interests:
Investigating spin chain excitations using matrix product states
Simulation of thermalisation
Jonas Verhellen
office: 120 032
Tel: +32 – (0)9 – 264 45 19
Research interests
Continuous Tensor Networks for Quantum Field Theories
In the past two to three decades, quantum information concepts – specifically entanglement entropy and similar measures – have been successfully used to gain a better understanding of quantum manybody systems. From this branch of research, the novel concept of a ‘tensor network’ – a convenient groundstate Ansatz that faithfully describes lowenergy states of quantum manybody systems – has emerged. The endeavour to extend these tensor network ideas to quantum field theories is firmly motivated by the intimate relation between condensed matter physics and the study of quantum field theory.
Holography and Quantum Information
During the latter half of the previous century, it was inferred from the thermodynamic black hole physics that certain facets of quantum gravity can be described by the quantum field degrees of freedom of a lowerdimensional (socalled holographic) surface. The postulate that claims the validity of the above statement for all realistic quantum gravity theories is widely known as the holographic principle. Recently, strong links between the holographic principle and aspects of quantum information, like entanglement entropy and quantum error correction, have been discovered. In addition, tensor network techniques have been designed to support the further development of quantum information theory in holography.
Computational Fluid Dynamics (with a strong preference for MHD)
In the past I have worked on the theory of ideal magnetohydrodynamics, a fluid model for plasma physics, on both a theoretical and a purely computational level. Even though I am currently not actively pursuing any further research in this field, I remain strongly interested in the topic. The techniques from computational fluid dynamics remain remarkably relevant to my current research, as variational optimalization on tensor networks also requires a numerical approach that deals with nonlinear ODEs and PDEs.