Stijn De Baerdemacker

Postdoc (WE05)
+32 (0)9 264 65 76
​​​​​Tech Lane Ghent Science Park, Campus A
Technologiepark 903, 9052 Zwijnaarde
Office n°020

A1 publications

2017

Block product density matrix embedding theory for strongly correlated spin systems , K. Gunst, S. Wouters, S. De Baerdemacker, D. Van Neck , Physical Review B , 95, 195127 , 2017 , IF: 3.836 , 18/67 [Q2]

2016

The Birkhoff theorem for unitary matrices of arbitrary dimensions , S. De Baerdemacker, A. De Vos (Alexis), L. Chen, L. Yu , Linear Algebra and its Applications , 514,151–164 , 2016 , IF: 0.965 , 64/312 [Q1]
Block-ZXZ synthesis of an arbitrary quantum circuit , A. De Vos (Alexis), S. De Baerdemacker , Physical Review A , 94, 052317 , 2016 , IF: 2.765 , 17/90 [Q1]
Read-Green resonances in a topological superconductor coupled to a bath , P. Claeys, S. De Baerdemacker, D. Van Neck , Physical Review B , 93 (22), 220503 , 2016 , IF: 3.718 , 16/67 [Q1]
Read-Green resonances in a topological superconductor coupled to a bath , P. Claeys, S. De Baerdemacker, D. Van Neck , Physical Review B , 93 (22) 220503(R) , 2016 , IF: 3.718 , 16/67 [Q1]
Maximum probability domains for Hubbard models , G. Acke, S. De Baerdemacker, P. Claeys, M. Van Raemdonck, W. Poelmans, D. Van Neck, P. Bultinck , Molecular Physics , 114 (7-8), 1392-1405 , 2016 , IF: 1.837 , 20/35 [Q1]
The Birkhoff theorem for unitary matrices of prime dimension , A. De Vos (Alexis), S. De Baerdemacker , Linear Algebra and its Applications , 493 (2016), 455-468 , 2016 , IF: By:C , 64/312 [Q1]

2015

Eigenvalue-based determinants for scalar products and form factors in Richardson–Gaudin integrable models coupled to a bosonic mode , P. Claeys, S. De Baerdemacker, M. Van Raemdonck, D. Van Neck , Journal of Physics A: Mathematical and Theoretical , 48 (42), 425201 , 2015 , IF: 1.933 , 11/53 [Q1]
Variational optimization of the second order density matrix corresponding to a seniority-zero configuration interaction wave function , W. Poelmans, M. Van Raemdonck, B. Verstichel, S. De Baerdemacker, A. Torre, L. Lain, G. Massaccesi, D. Alcoba, P. Bultinck, D. Van Neck , Journal of Chemical Theory and Computation (JCTC) , 11 (9), 4064–4076 , 2015 , IF: 5.301 , 5/35 [Q1]
Polynomial scaling approximations and Dynamic Correlation Corrections to Doubly Occupied Configuration Interaction wave functions , M. Van Raemdonck, D. Alcoba, W. Poelmans, S. De Baerdemacker, A. Torre, L. Lain, G. Massaccesi, D. Van Neck, P. Bultinck , Journal of Chemical Physics , 143 (10), 104106 , 2015 , IF: 2.894 , 9/35 [Q2]
Eigenvalue-based method and form-factor determinant representations for integrable XXZ Richardson-Gaudin models , P. Claeys, S. De Baerdemacker, M. Van Raemdonck, D. Van Neck , Physical Review B , 91 (15), 155102 , 2015 , IF: 3.718 , 16/67 [Q1]
CheMPS2: Improved DMRG-SCF routine and correlation functions , S. Wouters, W. Poelmans, S. De Baerdemacker, P.W. Ayers, D. Van Neck , Computer Physics Communications , 191, 235-237 , 2015 , IF: 3.635 , 1/53 [Q1]

2014

Scaling a Unitary Matrix , A. De Vos (Alexis), S. De Baerdemacker , Open Systems & Information Dynamics , 21 (4), 1450013 , 2014 , IF: 0.685 , 162/255 [Q3]
Matrix Calculus for Classical and Quantum Circuits , A. De Vos (Alexis), S. De Baerdemacker , ACM Journal on Emerging Technologies in Computing Systems (JETC) , 11 (2), 9 , 2014 , IF: 0.729 , 31/50 [Q3]
Non-Variational Orbital Optimization Techniques for the AP1roG Wave Function , K. Boguslawski, P. Tecmer, P.W. Ayers, P. Bultinck, S. De Baerdemacker, D. Van Neck , Journal of Chemical Theory and Computation (JCTC) , 10 (11), 4873-4882 , 2014 , IF: 5.498 , 5/34 [Q1]
Quasi-1D physics in Metal-Organic Frameworks: MIL-47(V) from first principles , D.E.P. Vanpoucke, J. Jaeken, S. De Baerdemacker, K. Lejaeghere, V. Van Speybroeck , Beilstein Journal of Nanotechnology , 5, 1738–1748 , 2014 , IF: 2.670 , 52/259 [Q1]
Projected seniority-two orbital optimization of the antisymmetric product of one-reference orbital geminal , K. Boguslawski, P. Tecmer, P.A. Limacher, P.A. Johnson, P.W. Ayers, P. Bultinck, S. De Baerdemacker, D. Van Neck , Journal of Chemical Physics , 140 (21), 214114 , 2014 , IF: 2.952 , 8/34 [Q1]
Efficient description of strongly correlated electrons with mean-field cost , K. Boguslawski, P. Tecmer, P.W. Ayers, P. Bultinck, S. De Baerdemacker, D. Van Neck , Physical Review B , 89 (20), 201106 , 2014 , IF: 3.736 , 14/67 [Q1]
Simple and inexpensive perturbative correction schemes for antisymmetric products of nonorthogonal geminals , P.A. Limacher, P.W. Ayers, P.A. Johnson, S. De Baerdemacker, D. Van Neck, P. Bultinck , Physical Chemistry Chemical Physics (PCCP) , 16 (11), 5061-5065 , 2014 , IF: 4.493 , 6/34 [Q1]
Exact solution of the p(x) + ip(y) pairing Hamiltonian by deforming the pairing algebra , M. Van Raemdonck, S. De Baerdemacker, D. Van Neck , Physical Review B , 89, 155136 , 2014 , IF: 3.736 , 14/67 [Q1]
The influence of orbital rotation on the energy of closed-shell wavefunctions , P.A. Limacher, T.D. Kim, P.W. Ayers, P.A. Johnson, S. De Baerdemacker, D. Van Neck, P. Bultinck , Molecular Physics , 112 (5-6), 853-862 , 2014 , IF: 1.720 , 18/34 [Q3]
Variational optimization of the 2DM: approaching three-index accuracy using extended cluster constraints , B. Verstichel, W. Poelmans, S. De Baerdemacker, S. Wouters, D. Van Neck , European Physical Journal B , 87(3), 59 , 2014 , IF: 1.345 , 44/67 [Q3]

2013

The NEGATOR as a Basic Building Block for Quantum Circuits , A. De Vos (Alexis), S. De Baerdemacker , Open Systems & Information Dynamics , 20 (1), 1350004 , 2013 , IF: 0.808 , 112/250 [Q2]
Perturbations on the superconducting state of metallic nanoparticles: influence of geometry and impurities , M. Van Raemdonck, S. De Baerdemacker, D. Van Neck , The European Physical Journal D , 67 (2013), 14 , 2013
A New Mean-Field Method Suitable for Strongly Correlated Electrons: Computationally Facile Antisymmetric Products of Nonorthogonal Geminals , P.A. Limacher, P.W. Ayers, S. De Baerdemacker, D. Van Neck, P. Bultinck , Journal of Chemical Theory and Computation (JCTC) , 9 (3), 1394-1401 , 2013 , IF: 5.310 , 3/33 [Q1]
A size-consistent approach to strongly correlated systems using a generalized antisymmetrized product of nonorthogonal geminals , P.A. Johnson, P.W. Ayers, P.A. Limacher, S. De Baerdemacker, D. Van Neck, P. Bultinck , Computational and Theoretical Chemistry , 1003 (2013), 101-113 , 2013 , IF: 1.368 , 96/136 [Q3]

2011

A primal-dual semidefinite programming algorithm tailored to the variational determination of the two-body density matrix , B. Verstichel, H. van Aggelen, D. Van Neck, P. Bultinck, S. De Baerdemacker , Computer Physics Communications , 182 (6), 1235-1244 , 2011 , IF: 3.268 , 2/55 [Q1]

Non CMM publications (A1)

Reversible Computation, Quantum Computation, and Computer Architectures in Between , A. De Vos (Alexis), M. Boes, S. De Baerdemacker , Journal of Multiple-Valued Logic and Soft Computing , 1 (SI), 67-81 , 2012
Richardson-Gaudin integrability in the contraction limit of the quasispin , S. De Baerdemacker , Physical Review C , 86 (4), 044332 , 2012
The Tamm-Dancoff Approximation as the boson limit of the Richardson-Gaudin equations for pairing , S. De Baerdemacker , Journal of Physics: Conference series , 284, 102020 , 2011
Decomposition of a Linear Reversible Computer: Digital Versus Analog , A. De Vos (Alexis), S. De Baerdemacker , International Journal of Unconventional Computing , 6 (3-4), 239-263 , 2010
Criticality in the configuration-mixed interacting boson model: (2) Q(X1)Q(X2)-Q(X2)Q(X2) mixing , V. Hellemans, P. Van Isacker, S. De Baerdemacker, K. Heyde , Nuclear Physics A , 819 (1-4), 11-26 , 2009
Collective Structures Within the Cartan-Weyl Based Geometrical Model , S. De Baerdemacker, K. Heyde, V. Hellemans , AIP Conference Proceedings , 1165, 238-239 , 2009
Spectral properties of a tractable collective Hamiltonian , S. De Baerdemacker, K. Heyde, V. Hellemans , Physical Review C , 79 (3), 034305 , 2009
The quadrupole collective model from a Cartan–Weyl perspective , S. De Baerdemacker, K. Heyde, V. Hellemans , Journal of Physics A: Mathematical and Theoretical , 41 (30), 304039 , 2008
Configuration mixing in the neutron-deficient 186-196Pb isotopes , V. Hellemans, S. De Baerdemacker, K. Heyde , Physical Review C , 77 (6), 064324 , 2008
Criticality in the configuration-mixed interacting boson model: (1) U(5)-(Q)over-cap(chi)-(Q)over-cap (chi) mixing , V. Hellemans, P. Van Isacker, S. De Baerdemacker, K. Heyde , Nuclear Physics A , 789 (1-4), 164-181 , 2007
Quadrupole collective variables in the natural Cartan–Weyl basis , S. De Baerdemacker, K. Heyde, V. Hellemans , Journal of Physics A: Mathematical and Theoretical , 40 (11), 2733 , 2007
Phase transitions in the configuration mixed interacting boson model: U(5)-O(6) mixing , V. Hellemans, P. Van Isacker, S. De Baerdemacker, K. Heyde , Acta Physica Polonica B , 38 (4), 1599-1603 , 2007
Solution of the Bohr Hamiltonian for a periodic potential with minimum at γ=π/6 , S. De Baerdemacker, L. Fortunato, V. Hellemans, K. Heyde , Nuclear Physics A , 769, 16-34 , 2006
Solution of the Bohr Hamiltonian for soft triaxial nuclei , L. Fortunato, S. De Baerdemacker, K. Heyde , Physical Review C , 74 (1), 014310 , 2006
Shape coexistence in the lead isotopes using algebraic models: Description of spectroscopic and ground-state related properties , R. Fossion, V. Hellemans, S. De Baerdemacker, K. Heyde , Acta Physica Polonica B , 36 (4), 1351-1354 , 2005
A theoretical description of energy spectra and two-neutron separation energies for neutron-rich zirconium isotopes , J.E. Garcıa-Ramos, K. Heyde, R. Fossion, V. Hellemans, S. De Baerdemacker , The European Physical Journal A - Hadrons and Nuclei , 26 (2), 221-225 , 2005
Soft triaxial rotor in the vicinity of γ = π/6 and its extensions , L. Fortunato, S. De Baerdemacker, K. Heyde , European Physical Journal , 25 (1), 439-440 , 2005
Configuration mixing in 188Pb: Band structure and electromagnetic properties , V. Hellemans, R. Fossion, S. De Baerdemacker, K. Heyde , Physical Review C , 71 (3), 034308 , 2004
Phase transitions versus shape coexistence , K. Heyde, J. Jolie, R. Fossion, S. De Baerdemacker, V. Hellemans , Physical Review C , 69 (5), 054304 , 2004
Global and local behaviour of nuclear ground-state properties as fingerprints to shape coexistence in the lead isotopes , R. Fossion, V. Hellemans, S. De Baerdemacker, K. Heyde , AIP Conference Proceedings , 726, 221-222 , 2004

A2 publications

B publications

2016

The Group Zoo of Classical Reversible Computing and Quantum Computing , A. De Vos (Alexis), S. De Baerdemacker , Springer , ISBN 978-3-319-33924 , 2016
The Synthesis of a Quantum Circuit , A. De Vos (Alexis), S. De Baerdemacker , Cambridge Scholars , ISBN 978-1-4438-8947 , 2016

P1 publications

2015

The Dicke model as the contraction limit of a pseudo-deformed Richardson-Gaudin model , P. Claeys, S. De Baerdemacker, M. Van Raemdonck, D. Van Neck , Journal of Physics Conference Series , 597, UNSP 012025 , 2015

2014

Probing pairing correlations in Sn isotopes using Richardson-Gaudin integrability , S. De Baerdemacker, V. Hellemans, R. van den Berg, J.-S. Caux, K. Heyde, M. Van Raemdonck, D. Van Neck, P.A. Johnson, A. Buekenhoudt , Journal of Physics: Conference series , 533, 012058 , 2014

2012

The roots of the NOT gate , A. De Vos (Alexis), S. De Baerdemacker , International Symposium on Multiple-Valued Logic , Book Series: International Symposium on Multiple-Valued Logic, 167,172 , 2012
Richardson-Gaudin description of pairing in atomic nuclei , S. De Baerdemacker , Journal of Physics: Conference series , 366, 012010 , 2012

Invited talks

2017

Richardson-Gaudin models and topological superconductivity , P. Claeys, S. De Baerdemacker, D. Van Neck , Q-Top: Quantum and Topological Matter meeting , Leiden University, The Netherlands , Fri, 03/02/2017

2016

Richardson-Gaudin models: What can we learn from (breaking) symmetry? , P. Claeys, S. De Baerdemacker, D. Van Neck , Institute of Physics , Amsterdam, The Netherlands , Wed, 23/11/2016
Richardson-Gaudin models: What can we learn from (breaking) symmetry? , P. Claeys, S. De Baerdemacker, D. Van Neck , Institut de Recherche en Mathématique et Physique , Louvain-la-Neuve, Belgium , Wed, 12/10/2016

Talks

2016

Read-Green resonances in an integrable superconductor coupled to a bath , P. Claeys, S. De Baerdemacker, D. Van Neck , XXIVth International Conference on Integrable Systems and Quantum symmetries (ISQS-24) , Prague, Czech Republic , Tue, 14/06/2016 to Sat, 18/06/2016
When two is better than one: the seniority scheme as a new tool to build wave functions , S. De Baerdemacker, P. Claeys, W. Poelmans, D. Van Neck, P. Bultinck, M. Van Raemdonck, P.W. Ayers, P.A. Limacher, P.A. Johnson, K. Boguslawski, P. Tecmer , QCB12 , Leuven, Belgium , Tue, 16/02/2016

2015

Integrable Dicke and Jaynes-Cummings models, and extensions , S. De Baerdemacker, P. Claeys, D. Van Neck , XXXth International Colloquium on Group Theoretical Methods in Physics , Ghent, Belgium , 27 , Tue, 14/07/2015 to Sat, 18/07/2015

2013

Richardson-Gaudin Integrable Systems (and Beyond) for Strongly Correlated Quantum Many-Body Systems , S. De Baerdemacker, P.W. Ayers, P. Bultinck, P.A. Johnson, P.A. Limacher, D. Van Neck, M. Van Raemdonck , MQM 2013 , Lugano, Switzerland , Sun, 02/06/2013 to Fri, 07/06/2013

Posters

2017

Making 2-electron response reduced density matrices N-representable , C. Lanssens, P.W. Ayers, D. Van Neck, S. De Baerdemacker, K. Gunst, P. Bultinck , International Summer School in Electronic Structure Theory: Electron Correlation in Physics and Chemistry , Aussois, France , Sun, 18/06/2017 to Sat, 01/07/2017

2016

Read-Green resonances in an integrable superconductor coupled to a bath , P. Claeys, S. De Baerdemacker, D. Van Neck , ISQS-24 , Prague, Czech Republic , Tue, 14/06/2016 to Sat, 18/06/2016
Read‐Green resonances in a topological superconductor coupled to a bath , P. Claeys, S. De Baerdemacker, D. Van Neck , General Scientific Meeting 2016 of the Belgian Physical Society , Ghent, Belgium , Wed, 18/05/2016

2015

Low dimensional physics in Metal-Organic Frameworks: a DFT study of breathing MIL-47 , D.E.P. Vanpoucke, J. Jaeken, S. De Baerdemacker, K. Lejaeghere, V. Van Speybroeck , Belgian Physical Society Meeting 2015 , Liège, Belgium , Wed, 13/05/2015

2014

Quasi-1D physics in breathing metal-organic frameworks , D.E.P. Vanpoucke, J. Jaeken, S. De Baerdemacker, V. Van Speybroeck, K. Lejaeghere , DZA 2014 meeting , Ghent, Belgium , Tue, 07/10/2014
New quasi-1D materials: DFT-study of breathing metal-organic frameworks , D.E.P. Vanpoucke, J. Jaeken, S. De Baerdemacker, K. Lejaeghere, A. Ghysels, M. Waroquier, V. Van Speybroeck , IAP P7/05 Annual meeting 2014 , Louvain-La-Neuve, Belgium , Fri, 19/09/2014
Exploring the phase diagram of the p_x + ip_y pairing Hamiltonian by linking the eigenstates to associated bosonic states. , M. Van Raemdonck, S. De Baerdemacker, D. Van Neck , 30th International Colloquium on Group Theoretical Methods in Physics , Ghent, Belgium , Mon, 14/07/2014 to Fri, 18/07/2014

2013

Interpreting the phase diagram of the p_x + ip_y pairing Hamiltonian by deforming the pairing algebra. , M. Van Raemdonck, S. De Baerdemacker, D. Van Neck , The "March" meeting , Namur, Belgium , Thu, 21/11/2013 to Sat, 23/11/2013
Reduced Density Matrix Optimization for the Two-Dimensional Hubbard Model , B. Verstichel, W. Poelmans, S. Wouters, S. De Baerdemacker, D. Van Neck , MQM 2013 , Lugano, Switzerland , Sun, 02/06/2013 to Fri, 07/06/2013

2012

Perturbations on the superconducting state of metallic nanoparticles: a canonical Richardson-Gaudin approach , M. Van Raemdonck, S. De Baerdemacker, D. Van Neck , International symposium on small particles and inorganic clusters XVI , Leuven Belgium , Sun, 08/07/2012 to Fri, 13/07/2012
A Khon-Sham-like model for the l-body reduced density matrix from a strongly-correlated reference , P.A. Johnson, P.W. Ayers, S. De Baerdemacker, D. Van Neck, P. Bultinck , DFTM2012 , Ghent University, Het Pand, Ghent, Belgium , Sun, 01/04/2012 to Fri, 06/04/2012