Person

Universitätsprofessor

Stefan Weßel

Ph. D.
Stefan Wessel
Lehr- und Forschungsgebiet Theoretische Physik (kondensierte Materie)

Adresse

Gebäude: Physikzentrum

Raum: 26 A 404

Otto-Blumenthal-Str. 26

52074 Aachen

Kontakt

workPhone
Telefon: +49 241 80 27033
Fax: +49 241 80 22188
 

Akademischer Lebenslauf

  • 1991 - 1994: Technische Universität Dortmund (Vordiplom)
  • 1994 - 1998: Ludwig-Maximilians Universität München (Diplom)
  • 1998 - 2001: University of Southern California (Ph.D.)
  • 2001 - 2004: ETH Zürich (Postdoc)
  • 2005 - 2010: Universität Stuttgart (Wissenschaftlicher Angestellter, Habilitation 2007)
  • seit 2011: Professor an der RWTH Aachen University
 

Vorlesungen

  • Sommer 2018: Quantentheorie der Vielteilchensysteme, Topological Aspects of Condensed Matter Theory
  • Winter 2017: Theoretische Physik IV: Statistische Physik
  • Winter 2016: Theoretische Physik IV: Statistische Physik
  • Sommer 2016: Vorkurs Mathematische Methoden der Physik
  • Sommer 2016: Quantentheorie der Vielteilchensysteme
  • Winter 2015: Quantum Theory of Condensed Matter
  • Sommer 2015: Statistical Physics
  • Winter 2014: Quantum Theory of Condensed Matter
  • Sommer 2014: Statistical Physics
  • Winter 2013: Quantum Theory of Condensed Matter
  • Sommer 2013: Statistical Physics
  • Winter 2012: Theoretische Physik IV: Statistische Physik
  • Sommer 2012: Computational Physics
  • Winter 2011: Theoretische Physik IV: Statistische Physik
  • Sommer 2011: Computational Physics
  • Sommer 2010: Relativitätstheorie II
  • Winter 2009: Relativitätstheorie I
  • Sommer 2009: Advanced Statistical Physics, Quantenfeldtheorie niedrigdimensionaler Systeme (Seminar)
  • Winter 2008: Astronomie und Astrophysik II
  • Sommer 2008: Astronomie und Astrophysik I
  • Winter 2007: Advanced Quantum Theory
  • Sommer 2007: Simulationsmethoden in der Physik II
  • Winter 2006: Simulationsmethoden in der Physik I
  • Sommer 2006: Simulationsmethoden in der Physik II
  • Winter 2005: Simulationsmethoden in der Physik I
  • Sommer 2005: Solid State Theory
 

Publikationen

C. Koop and S. Wessel,
Quantum phase transitions in effective spin-ladder models for graphene zigzag nanoribbons,
Phys. Rev. B 96, 165114 (2017).

S. Wessel, B. Normand, F. Mila, and A. Honecker
Efficient Quantum Monte Carlo simulations of highly frustrated magnets: the frustrated spin-1/2 ladder,
SciPost Phys. 3, 005 (2017).

J. Becker, T. Köhler, A. C. Tiegel, S. R. Manmana, and S. Wessel,
Finite-temperature dynamics and thermal intra-band magnon scattering in Haldane spin-one chains,
Phys. Rev. B 96, 060403 (R) (2017).

M. Lohöfer and S. Wessel,
Excitation Gap Scaling near Quantum Critical Three-Dimensional Antiferromagnets,
Phys. Rev. Lett. 118, 147206 (2017).

W. Selke and S. Wessel,
Anisotropic XY antiferromagnets in a field,
Eur. Phys. J. Special Topics 226, 779 (2017).

F. Parisen Toldin, F. F. Assaad, and S. Wessel,
Critical behavior in the presence of an order parameter pinning field,
Phys. Rev. B 95, 014401 (2017).

X. Y. Xu, S. Wessel, and Z. Y. Meng,
Competing pairing channels in the doped honeycomb lattice Hubbard model,
Phys. Rev. B 94, 115105 (2016).

S. Hesselmann and S. Wessel,
Thermal Ising transitions in the vicinity of two-dimensional quantum critical points,
Phys. Rev. B 93, 155157 (2016).

A. Honecker, S. Wessel, R. Kerkdyk, T. Pruschke, F. Mila, and B. Normand,
Thermodynamic properties of highly frustrated quantum spin ladders: influence of many-particle bound states,
Phys. Rev. B 93, 054408 (2016).

M. Lohöfer, T. Coletta, D. G. Joshi, F. F. Assad, M. Vojta, S. Wessel, and F. Mila,
Dynamical structure factors and excitation modes of the bilayer Heisenberg model,
Phys. Rev. B 92, 245137 (2015).

J. Greitemann, S. Hesselmann, S. Wessel, F. F. Assaad, and M. Hohenadler,
Finite-size effects in Luther-Emery phases of Holstein and Hubbard models,
Phys. Rev. B 92, 245132 (2015).

M. Golor and S. Wessel,
Nonlocal density interactions in auxiliary-field quantum Monte Carlo simulations: applications to the square lattice bilayer and honeycomb lattice,
Phys. Rev. B 92, 195154 (2015).

J. Helmes and S. Wessel,
Correlations and entanglement scaling in the quantum critical bilayer XY model,
Phys. Rev. B 92, 125120 (2015).

A. Völl and S. Wessel,
Spin dynamics of the bilinear-biquadratic S = 1 Heisenberg model on the triangular lattice: a quantum Monte Carlo study,
Phys. Rev. B 91, 165128 (2015).

H. T. Dang, X. Y. Xu, K.-S. Chen, Z. Y. Meng, and S. Wessel,
Mott transition in the triangular lattice Hubbard model: a dynamical cluster approximation study,
Phys. Rev. B 91, 155101 (2015).

E.M. Stoudenmire, P. Gustainis, R. Johal, S. Wessel, and R. G. Melko,
Corner contribution to the entanglement entropy of strongly-interacting O(2) quantum critical systems in 2+1 dimensions,
Phys. Rev. B 90, 235106 (2014).

M. Golor, T. Reckling, L. Classen, M. M. Scherer, and S. Wessel,
Ground state phase diagram of the half-filled bilayer Hubbard model,
Phys. Rev. B 90, 195131 (2014).

U.Tutsch, B.Wolf, S. Wessel, L. Postulka, Y. Tsui, H. O. Jeschke, I. Opahle, T.Saha-Dasgupta, R.Valenti, A. Brühl, K. Removic-Langer, T.Kretz, H.-W.Lerner, M.Wagner, and M.Lang,
Evidence of a field-induced Berezinskii-Kosterlitz- Thouless scenario in a two-dimensional spin dimer system,
Nature Comm. 5, 5169 (2014).

J. Helmes and S. Wessel,
Entanglement entropy scaling in the bilayer Heisenberg spin system,
Phys. Rev. B 89, 245120 (2014).

M. Golor, S. Wessel, and M. J. Schmidt,
Quantum Nature of Edge Magnetism in Graphene,
Phys. Rev. Lett. 112, 046601 (2014).

M. Lohöfer, L. Bonnes, and S. Wessel,
Thermal phase transitions in a honeycomb lattice gas with three-body interactions,
Phys. Rev. E 88, 052135 (2013).

M. Golor, C. Koop, T. C. Lang, S. Wessel, and M. J. Schmidt,
Magnetic Correlations in Short and Narrow Graphene Armchair Nanoribbons,
Phys. Rev. Lett. 111, 085504 (2013).

T. C. Lang, Z. Y. Meng, A. Muramatsu, S. Wessel, and F. F. Assaad,
Dimerized Solids and Resonating Plaquette Order in SU(N)-Dirac Fermions,
Phys. Rev. Lett. 111, 066401 (2013).

M. J. Schmidt, M. Golor, T. C. Lang, and S. Wessel,
Effective models for strong correlations and edge magnetism in graphene,
Phys. Rev. B 87, 245431 (2013).

D. M. Hübscher and S. Wessel,
Stiffness jump in the generalized XY model on the square lattice,
Phys. Rev. E 87, 062112 (2013).

T. C. Lang, A. M. Essin, V. Gurarie, and S. Wessel,
Z2 topological invariants in two dimensions from quantum Monte Carlo,
Phys. Rev. B 87, 205101 (2013).

M. Golor, T. C. Lang, and S. Wessel,
Quantum Monte Carlo studies of edge magnetism in chiral graphene nanoribbons,
Phys. Rev. B 87, 155441 (2013).

S. Wessel,
Recension: Ultracold Atoms in Optical Lattices,
Physik Journal (June 2013)

S. Wessel,
Absence of valence-bond supersolidity on the checkerboard lattice,
Phys. Rev. B 86, 140501(R) (2012).

L. Bonnes, K. R. A. Hazzard, S. R. Manmana, A. M. Rey, and S. Wessel ,
Adiabatic Loading of One-Dimensional SU(N) Alkaline Earth Fermions in Optical Lattices,
Phys. Rev. Lett. 109, 205305 (2012).

T. C. Lang, Z. Y. Meng, M. M. Scherer, S. Uebelacker, F. F. Assaad, A. Muramatsu, C. Honerkamp, and S. Wessel,
Antiferromagnetism in the Hubbard Model on the Bernal-stacked Honeycomb Bilayer,
Phys. Rev. Lett. 109, 126402 (2012).

D. Peter, S. Müller, S. Wessel, and H. P. Büchler,
Anomalous Behavior of Spin Systems with Dipolar Interactions,
Phys. Rev. Lett. 109, 025303 (2012).

S. Göttel, S. Andergassen, C. Honerkamp, D. Schuricht, and S. Wessel,
Critical scales in anisotropic spin systems from functional renormalization,
Phys. Rev. B 85, 214406 (2012).

M. Hohenadler, S. Wessel, M. Daghofen, and F. F. Assaad,
Interaction-range effects for fermions in one dimension,
Phys. Rev. B 85, 195115 (2012).

A. Jagannathan, B. Doucot, A. Szallas, and S. Wessel,
Geometric fluctuations in a two-dimensional quantum antiferromagnet,
Phys. Rev. B 85, 094434 (2012).

M. Hohenadler, Z. Y. Meng, T. C. Lang, S. Wessel, A. Muramatsu, and F. F. Assaad,
Quantum-Phase-Transitions in the Kane-Mele-Hubbard model,
Phys. Rev. B 85, 115132 (2012).

L. Bonnes and S. Wessel,
Half-vortex unbinding and Ising transition in constrained superfluids,
Phys. Rev. B 85, 094513 (2012).

L. Bonnes and S. Wessel,
Generic first-order vs. continuous quantum nucleation of supersolidity,
Phys. Rev. B 84, 054510 (2011).

H. Feldner, Z. Y. Meng, T. C. Lang, F. F. Assaad, S. Wessel, and A. Honecker,
Dynamical Signatures of Edge-State Magnetism on Graphene Nanoribbons,
Phys. Rev. Lett. 106, 226401 (2011).

L. Fritz, R. L. Doretto, S. Wessel, S. Wenzel, S. Burdin, and M. Vojta,
Cubic interactions and quantum criticality in dimerized antiferromagnets,
Phys. Rev. B 83, 174416 (2011).

L. Bonnes and S. Wessel,
Pair Superfluidity of Three-Body Constrained Bosons in Two Dimensions,
Phys. Rev. Lett. 106, 185302 (2011).

The ALPS Collaboration (B. Bauer, et al.),
The ALPS project release 2.0: Open source software for strongly correlated systems,
JSTAT, P05001 (2011).

L. Bonnes and S. Wessel,
Supersolid polar molecules beyond pairwise interactions,
Phys. Rev. B 83, 134511 (2011).

W. Selke, M. Holtschneider, R. Leidl, S. Wessel, and G. Bannasch,
Uniaxially anisotropic antiferromagnets in a field along the easy axis,
Physics Procedia 6, 84 (2010).

Z. Y. Meng, T. Lang, S. Wessel, F. Assaad, and A. Muramatsu,
Spin Liquid Phase in the Hubbard Model on the Honeycomb Lattice,
High Performance Computing in Science and Engineering 2010, Springer (2010).

T. Fabritius N. Laflorencie, and S. Wessel,
Finite temperature ordering of diulte graphene antiferromagnets,
Phys. Rev. B 82, 035402 (2010).

L. Bonnes, H. P. Büchler and S. Wessel,
Polar Molecules with Three-Body Interactions on the Honeycomb Lattice,
New J. of Physics, 12 053027 (2010).

Z. Y. Meng, T. Lang, S. Wessel, F. Assaad, and A. Muramatsu,
Quantum spin liquid emerging in two-dimensional correlated Dirac fermions,
Nature 464, 847 (2010).

H. Feldner, A. Honecker, D. Cabra, S. Wessel, Z. Y. Meng, and F. F. Assaad,
Edge Magnetism in Graphene: Mean-Field Theory compared with Exact Diagonalization and Quantum Monte Carlo Simulation,
Phys. Rev. B. 81, 115416 (2009).

S. Wessel,
Critical entropy of quantum Heisenberg magnets on simple-cubic lattices,
Phys. Rev. B 81, 052405 (2010).

W. Selke, G. Bannasch, M. Holtschneider, I.P. McCulloch, D. Peters, and S. Wessel,
Classical and quantum anisotropic Heisenberg antiferromagnets,
Condensed Matter Physics 12, 547 (2009).

A. Honecker and S. Wessel,
Magnetocaloric Effect in Quantum Spin-s Chains,
Condensed Matter Physics 12, 399 (2009).

J. Engel and S. Wessel,
From enhanced to reduced quantum antiferromagnetism by tuning a magnetic impurity,
Phys. Rev. B 80, 094404 (2009).

A. Szallas, A. Jagannathan, and S. Wessel,
A phason disordered two dimensional quantum antiferromagnet,
Phys. Rev. B 79, 172406 (2009).

S. R. Manmana, S. Wessel, R. M. Noack, and A. Muramatsu,
Time evolution of correlations in strongly interacting fermions after a quantum quench,
Phys. Rev. B 79, 155104 (2009).

B. Capogrosso-Sansone, S. Wessel, H.P. Büchler, P. Zoller, and G. Pupillo,
Phase diagram of one-dimensional hard-core bosons with three-body interactions,
Phys. Rev. B 79, R020503 (2009).

S. Wessel,
Perspective: Ultrakalt vom Metall zum Isolator,
Physik Journal (March 2009)

F. Karim Pour, M. Rigol, S. Wessel, and A. Muramatsu,
Supersolid Fermions Inside Harmonic Traps,
High Performance Computing in Science and Engineering 2008, Springer (2008).

W. Selke, M. Holtschneider, R. Leidl, S. Wessel, and G. Bannasch,
Uniaxially anisotropic antiferromagnets in a field along the easy axis,
Computer Simulation Studies in CondensedMatter Physics XXI, Eds. D. P. Landau, S.P. Lewis,
and H. B. Schuttler, Springer-Verlag, Heidelberg, Berlin, 2008.

Z. Y. Meng and S. Wessel,
Phases and magnetization process of an anisotropic Shastry-Sutherland model,
Phys. Rev. B 78, 224416 (2008).

S. Wessel,
Mixed columnar-plaquette phase of hard-core bosons and its quantum melting,
Phys. Rev. B 78, 075112 (2008).

S. Wessel,
Mixed columnar-plaquette phase of hard-core bosons and its quantum melting,
Phys. Rev. B 78, 075112 (2008).

Y.-C. Chen, R. Melko, S. Wessel, and Y.-J. Kao,
Supersolidity from defect-condensation in the extended boson Hubbard model,
Phys. Rev. B 77, 014524 (2008).

S. Manmana, K. Rodriguez, S. Wessel, and A. Muramatsu,
Simulations of Strongly Correlated Quantum Systems out of Equilibrium,
High Performance Computing in Science and Engineering 2007, Springer (2007).

S. Wessel,
Simulations of atomic gases on frustrated optical lattices,
Computer Physics Communications 177, 166 (2007).

A. F. Albuquerque et al. (ALPS collaboration),
The ALPS project release 1.3: open source software for strongly correlated systems,
Journal of Magnetism and Magnetic Materials 310, 1187 (2007).

S. Wessel, N. Stoop, E. Gull, S. Trebst, and M. Troyer,
Optimized Broad-Histogram Ensembles for the Simulation of Quantum Systems,
J. Stat. Mech. P12005 (2007).

M. Holtschneider, S. Wessel, and W. Selke,
Classical and quantum two-dimensional anisotropic Heisenberg antiferromagnets,
Phys. Rev. B 75, 224417 (2007).

A. Jagannathan, A. Szallas, S. Wessel, and M. Duneau,
The Penrose quantum antiferromagnet,
Phys. Rev. B 75, 212407 (2007).

S. R. Manmana, S. Wessel, R. M. Noack, and A. Muramatsu,
Strongly Correlated Fermions After a Quantum Quench,
Phys. Rev. Lett. 98, 210405 (2007).

S. Wessel,
Phase diagram of interacting bosons on the honeycomb lattice,
Phys. Rev. B 75, 174301 (2007).

F. Karim Pour, M. Rigol, S. Wessel, and A. Muramatsu,
Supersolids in Confined Fermions on One-Dimensional Optical Lattices,
Phys. Rev. B 75, 161104(R) (2007).

B. Pedrini, S. Wessel, J. L. Gavilano, H. R. Ott, S. M. Kazakov, and J. Karpinski,
Quenching of the Haldane gap in LiVSi2O6 and related compounds,
Eur. Phys. J. B 55, 219 (2007).

S. Wessel and M. Troyer,
Supersolid Bosons on the Triangular Lattice,
Conference Proceeding, ESF Exploratory Workshop ”Effective Models for Low - Dimensional
Strongly Correlated Systems”, AIP Conference Proceedings 816, 277 (2006).

S. Wessel and A. Muramatsu,
Quantum Monte Carlo Simulations of Strong Correlations,
Conference Proceeding, NIC Symposium 2006, NIC Series Vol. 32 (2006).

A. Honecker and S. Wessel,
Magnetocaloric effect in two-dimensional spin-1/2 antiferromagnets,
Conference Proceeding, SCES’05, Physica B, Vol. 378-380, 1098 (2006).

C. Lavalle, S. Wessel, and A. Muramatsu,
Monte Carlo Simulations of Strongly Correlated and Frustrated Quantum Systems,
High Performance Computing in Science and Engineering 2006, Springer (2006).

H. Gimperlein, S. Wessel, J. Schmiedmayer, and L. Santos,
Random on-site interactions versus random chemical potential in ultra cold atoms in optical lattices,
Appl. Phys. B 82, 217 (2006).

A. Jagannathan, R. Moessner, and S. Wessel,
Inhomogeneous quantum antiferromagnetism on periodic lattices,
Phys. Rev. B 74, 184410 (2006).

S. V. Isakov, S. Wessel, R. G. Melko, K. Sengupta, and Yong Baek Kim,
Valence Bond Solids and Their Quantum Melting in Hard-Core Bosons on the Kagome Lattice,
Phys. Rev. Lett. 97, 147202 (2006).

O. Gygi, H. G. Katzgraber, M. Troyer, S. Wessel, and G. G. Batrouni,
Simulations of ultracold bosonic atoms in optical lattices with anharmonic traps,
Phys. Rev. A 73, 063606 (2006).

N. Laflorencie, S. Wessel, A. Läuchli, and H. Rieger,
Random-exchange quantum Heisenberg antiferromagnets on the square lattice,
Phys. Rev. B 73, 060403(R) (2006).

N. Fukushima, A. Honecker, S. Wessel, S. Grossjohan, and W. Brenig,
Specific heat and magnetic susceptibility of ferromagnetic mixed-spin chain systems,
Conference Proceeding, SCES’04, Physica B, Vol. 359-361, 1409 (2005).

F. Alet et al. (ALPS collaboration),
The ALPS Project: Open Source Software for Strongly Correlated Systems,
J. Phys. Soc. Jpn. Suppl.74, 30 (2005).

C. Lavalle, D. Pertot, M. Rigol, S. Wessel, and A. Muramatsu,
Numerical simulations of quantum gases, magnetic, and correlated electronic systems,
High Performance Computing in Science and Engineering 2005, Springer (2005).

O. Nohadani, S. Wessel, and S. Haas,
Bose-Glass Phases in Disordered Quantum Magnets,
Phys. Rev. Lett. 95, 227201 (2005).

M. Rigol, S. R. Manmana, A. Muramatsu, R. T. Scalettar, R. R. P. Singh, and S. Wessel,
Comment on ”Novel Superfluidity in a Trapped Gas of Fermi Atoms with Repulsive Interaction Loaded on an Optical Lattice”,
Phys. Rev. Lett. 95, 218901 (2005).

H. Gimperlein, S. Wessel, J. Schmiedmayer, and L. Santos,
Ultracold Atoms in Optical Lattices with Random On-Site Interactions,
Phys. Rev. Lett. 95, 170401 (2005).

S. Wessel and M. Troyer,
Supersolid Hard-Core Bosons on the Triangular Lattice,
Phys. Rev. Lett. 95, 127205 (2005).

O. Nohadani, S. Wessel, and S. Haas,
Quantum phase transitions in coupled dimer compounds,
Phys. Rev. B 72, 024440 (2005).

S. Wessel, F. Alet, S. Trebst, D. Leumann, M. Troyer, and G. G. Batrouni,
Bosons in Optical Lattices - from the Mott Transition to the Tonks-Girardeau Gas,
J. Phys. Soc. Jpn. Suppl. 74, 10 (2005).

S. Wessel, S. Trebst, and M. Troyer,
A RENORMALIZATION APPROACH TO THE SIMULATION OF QUANTUM EFFECTS
IN NANO-SCALE MAGNETIC SYSTEMS,
SIAM Multiscale Modeling and Simulation Journal 4, 237 (2005).

S. Wessel,
Comment “Quantum Spins and Quasiperiodicity: A Real Space Renormalization Group Approach”,
Phys. Rev. Lett. 94, 029701 (2005).

F. Alet, S. Wessel, and M. Troyer,
Generalized directed loop method for quantum Monte Carlo simulations,
Phys. Rev. E 71, 036706 (2005).

S. Wessel and I. Milat,
Quantum fluctuations and excitations in antiferromagnetic quasicrystals,
Phys. Rev. B 71, 104427 (2005).

S. Wessel, F. Alet, M. Troyer, and G. G. Batrouni,
Quantum Monte Carlo Simulations of Confined Bosonic Atoms in Optical Lattices,
Conference Proceeding, Frühjahrstagung des Arbeitskreises Festkörperphysik der Deutschen Physikalischen Gesellschaft 2004,
Adv. Solid State Phys. 44, 265 (2004).

M. Troyer, F. Alet, and S. Wessel,
Histogram Methods for Quantum Systems: From Reweighting to Wang-Landau Sampling,
Conference Proceeding, IIIrd Brazilian Meeting on Simulational Physics, Brazil (2003),
Braz. J. of Physics 34, 377 (2004).

B. Normand, M. Matsumoto, O. Nohadani, S. Wessel, S. Haas, T.M. Rice, and M. Sigrist,
Pressure- and field-induced magnetic quantum phase transitions in TlCuCl3,
Conference Proceeding, Highly Frustrated Magnets, Frankreich (2003),
J. Phys. Condens. Matter, 16, No. 11, 867 (2004).

S. Wessel, F. Alet, M. Troyer, and G. G. Batrouni,
Quantum Monte Carlo simulations of confined bosonic atoms in optical lattices,
Phys. Rev. A 70, 053615 (2004).

B. Pedrini, J. L. Gavilano, D. Rau, H. R. Ott, S. M. Kazakov, J. Karpinski, and S. Wessel,
NMR and dc-susceptibility studies of NaVGe2O6,
Phys. Rev. B 70, 024421 (2004).

O. Nohadani, S. Wessel, B. Normand, and S. Haas,
Universal scaling at field-induced magnetic phase transitions,
Phys. Rev. B 69, 220402(R) (2004).

N. Fukushima, A. Honecker, S. Wessel, and W. Brenig,
Thermodynamic properties of ferromagnetic mixed-spin chain systems,
Phys. Rev. B 69, 174430 (2004).

P. Dayal, S. Trebst, S. Wessel, D. Würtz, M. Troyer, S. Sabhapandit and S. Coppersmith,
Performance Limitations of Flat-Histogram Methods,
Phys. Rev. Lett. 92, 097201 (2004).

M. Troyer, F. Alet, S. Trebst, and S. Wessel,
Non-Local Updates for Quantum Monte Carlo Simulations,
Conference Proceeding, The Monte Carlo Method in the Physical Sciences: Celebrating the
50th Anniversary of the Metropolis Algorithm, AIP Conference Proceedings 690, 156 (2003).

S. Wessel, M. Troyer, and F. Alet,
Flat Histogram Methods for Quantum Systems,
Conference Proceedings, The Monte Carlo Method in the Physical Sciences: Celebrating the
50th Anniversary of the Metropolis Algorithm, AIP Conference Proceedings 690, 402 (2003).

S. Trebst, P. Dayal, S. Wessel, D. Würtz, M. Troyer, S. Sabhapandit, and S. Coppersmith,
Optimality of Wang-Landau Sampling and Performance Limitations of Flat Histogram Methods,
Conference Proceedings, The Monte Carlo Method in the Physical Sciences: Celebrating the
50th Anniversary of the Metropolis Algorithm, AIP Conference Proceedings 690, 400 (2003).

F. Alet, S. Wessel, and M. Troyer,
Improved Directed Loop Method for Quantum Monte Carlo Simulations,
Conference Proceedings, The Monte Carlo Method in the Physical Sciences: Celebrating the
50th Anniversary of the Metropolis Algorithm, AIP Conference Proceedings 690, 369 (2003)

S. Wessel, M. Indergand, A. Läuchli, U. Ledermann, and M. Sigrist,
Inhomogeneously doped two-leg ladder systems,
Phys. Rev. B 67, 184517 (2003).

S. Wessel, A. Jagannathan, and S. Haas,
Quantum Antiferromagnetism in Quasicrystals,
Phys. Rev. Lett. 90, 177205 (2003).

M. Troyer, S. Wessel, and F. Alet,
Flat Histogram Methods for Quantum Systems: Algorithms to Overcome Tunneling Problems
and Calculate the Free Energy,
Phys. Rev. Lett. 90, 120201 (2003).

A. Läuchli, S. Wessel, and M. Sigrist,
Phase diagram of the quadrumerized Shastry-Sutherland model,
Phys. Rev. B 66, 014401 (2002).

S. Wessel and S. Haas,
Redistribution of spectral weight in Haldane chains doped with spin-1/2 moments,
Phys. Rev. B 65, 132402 (2002).

S. Wessel, M. Olshanii, and S. Haas,
Field-Induced Magnetic Order in Quantum Spin Liquids,
Phys. Rev. Lett. 87, 206407 (2001).

S. Wessel and S. Haas,
Phase diagram and thermodynamic properties of the square lattice of antiferromagnetic spin-1/2 triangles in La4Cu3MoO12,
Phys. Rev. B 63, R140403 (2001).

S. Wessel, B. Normand, M. Sigrist, and S. Haas,
Order by Disorder from Non-Magnetic Impurities in a Two-Dimensional Quantum Spin Liquid,
Phys. Rev. Lett. 86, 1086 (2001).

S. Wessel and S. Haas,
Magnetic field induced ordering in quasi-one-dimensional quantum magnets,
Eur. Phys. J. B 16, 393 (2000).

S. Wessel and S. Haas,
Three-dimensional ordering in weakly coupled antiferromagnetic ladders and chains,
Phys. Rev. B 62, 316 (2000).

S. Wessel and S. Haas,
Excitation spectra and thermodynamical response of segmented Heisenberg spin chains,
Phys. Rev. B 61, 15262 (2000).