quinten.mortier@ugent.be

office: 120 032

Tel: +32 – (0)9 – 264 45 19

Research interests: 

markus.hauru@ugent.be

office: 120 005

Tel: +32 – (0)9 – 264 49 76

Research Interests: 

I work on tensor network methods for many-body physics, especially in relation to real-space renormalization group transformations and decoherence.

tom.vieijra@ugent.be

office: 120 032

Tel: +32 – (0)9 – 264 45 19

Research Interests: 

jacopo.denardis@ugent.be

office: 120 005

Tel: +32 – (0)9 – 264 48 38

Research interests: 

andrew.hallam@ugent.be

office: 120 005

Tel: +32 – (0)9 – 264 49 71

Research Interests: 

laurens.lootens@ugent.be

office: 120 005

Tel: +32 – (0)9 – 264 49 76

Research Interests: 

matthias.bal@ugent.be

office: 120 005

Tel: +32 – (0)9 – 264 49 76

Research interests:

Tensor networks and real-space renormalization

laurens.vanderstraeten@ugent.be

office: 120 005

Tel: +32 – (0)9 – 264 48 38

Research interests:

Matrix product states and tangent-space methods
Low-energy dynamics of quantum spin chains
Projected entangled-pair states: ground states and excitations

karel.vanacoleyen@ugent.be

office:  120 005

Tel: +32 – (0)9 – 264 47 62

Teaching:

Theory of relativity
Theory of relativity and classical fields

jutho.haegeman@ugent.be

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 low-energy quantum many body states, as motivated by the area law scaling of entanglement entropy. On the one hand, tensor network states enable accurate ab-initio simulations of the low-energy 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:

Hiking and photography

robijn.vanhove@ugent.be

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

benoit.tuybens@ugent.be

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 time-dependent cMPS ansatz

nele_callebaut@hotmail.com

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@gmail.com

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 non-commutative 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 infinite-dimensional Hilbert spaces, like photonic systems.

jvdoorss@gmail.com

Research interests:

Magnetic field induced effects in gauge and condensed matter theories

bavhecke.vanhecke@ugent.be

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@ugent.be

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@ugent.be

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@ugent.be

office:  120 005

Tel:  +32  – (0)9 – 264 49 76

Research interests:

The application of tensor networks on quantum chemical systems

stijn.debaerdemacker@ugent.be

office: 120.005

Tel: +32 – (0)9 – 264 48 38

Research interests 

(Quantum) many-body 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 many-body systems persist to elude us. Think about the high-Tc superconductors, or large complex (bio)-molecules involving multiple transition-metal 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 many-body theories around it.

Currently, a major theme in my research is to go “beyond integrability”. Conventional quantum many-body methods start from uncorrelated quantum states upon which quantum correlations are subsequently built in. However more symmetric than their non-integrable 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 mean-field 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 mean-field 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 integrability-breaking Richardson-Gaudin models
Pieter Claeys, Jean-Sebastien Caux, Dimitri Van Neck, Stijn De Baerdemacker
[arXiv:1707.06793]  orcid nr: 0000-0001-7933-3227

gertian.roose@ugent.be

office: 120 032

Tel: +32 – (0)9 – 264 45 19

Research interests:

Dynamical mass generation in the Gross-Neveu model using tensor network methods

maarten.vandamme@ugent.be

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@ugent.be

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 many-body systems. From this branch of research, the novel concept of a ‘tensor network’ – a convenient ground-state Ansatz that faithfully describes low-energy states of quantum many-body 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 lower-dimensional (so-called 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 non-linear ODEs and PDEs.