Roger Melko

Roger Melko's picture
Associate Faculty
University of Waterloo - Department of Physics and Astronomy

Area of Research:
Condensed Matter
Phone: (519) 569-7600 x8560

Research Interests

My group's interests involve strongly-correlated quantum many-body systems, with a focus on emergent phenomena, novel phases and phase transitions, quantum criticality, and entanglement. We emphasize computational methods as a theoretical technique, in particular the development of state-of-the-art algorithms for the study of strongly-interacting systems. Our work has employed Monte Carlo simulations, Density Matrix Renormalization Group, series expansions, and most recently machine learning and neural networks.
With these and related methods, my group explores the low-energy physics in quantum magnets, cold atoms in optical lattices, bosonic fluids, and models of topological quantum computers. I am particularly involved in studying microscopic models that display interesting quantum behavior in the bulk, such as superconducting, spin liquid, topological, superfluid or supersolid phases. We are also interested in broader ideas in computational physics, the development of efficient algorithms for simulating quantum mechanical systems on classical computers, and the relationship of these methods to the field of quantum information science.

Positions Held

  • 2017- Creative Destruction Labs Chief Scientist
  • 2007- Department of Physics and Astronomy, University of Waterloo Professor
  • 2005-2007 Oak Ridge National Laboratory, Tennessee Wigner Fellow

Awards

  • Herzberg Medal Canadian Association of Physicists
  • Young Scientist Prize in Computational Physics, International Union of Pure and Applied Physics (IUPAP), "for his innovative and deep achievements in developing quantum Monte Carlo methods for quantum information theory and condensed matter physics."
  • Early Researcher Award, Ontario Ministry of Research and Innovation

Recent Publications

  • Peter Broecker, Juan Carrasquilla, Roger G. Melko, Simon Trebst Machine learning quantum phases of matter beyond the fermion sign problem Scientific Reports 7, 8823 (2017) arXiv: 1608.07848
  • Juan Carrasquilla, Gang Chen, Roger G. Melko Tripartite entangled plaquette state in a cluster magnet Phys. Rev. B 96, 054405 (2017) arXiv: 1704.03478
  • Giacomo Torlai, Roger G. Melko A Neural Decoder for Topological Codes Phys. Rev. Lett. 119, 030501 (2017) arXiv: 1610.04238
  • Cubic trihedral corner entanglement for a free scalar Lauren E. Hayward Sierens, Pablo Bueno, Rajiv R. P. Singh, Robert C. Myers, Roger G. Melko Journal-ref: Phys. Rev. B 96, 035117 (2017) arXiv: 1703.03413
  • Identifying polymer states by machine learning Qianshi Wei, Roger G. Melko, Jeff Z. Y. Chen Phys. Rev. E 95, 032504 (2017) arXiv: 1701.04390
  • Julia Wildeboer, Alexander Seidel, Roger G. Melko Entanglement Entropy and Topological Order in Resonating Valence-Bond Quantum Spin Liquids Phys. Rev. B 95, 100402 (2017) arXiv: 1510.07682
  • Entanglement area law in superfluid 4He C. M. Herdman, P.-N. Roy, R. G. Melko, A. Del Maestro Nature Physics 13, 556 (2017) arXiv: 1610.08518
  • William Witczak-Krempa, Lauren E. Hayward Sierens, Roger G. Melko Cornering gapless quantum states via their torus entanglement Phys. Rev. Lett. 118, 077202 (2017) arXiv: 1603.02684
  • Juan Carrasquilla, Roger G. Melko Machine learning phases of matter Nature Physics 13, 431-434 (2017) arXiv: 1605.01735
  • Giacomo Torlai, Roger G. Melko Learning Thermodynamics with Boltzmann Machines Phys. Rev. B 94, 165134 (2016) arXiv: 1606.02718
  • Leilee Chojnacki, Caleb Q. Cook, Denis Dalidovich, Lauren E. Hayward Sierens, Étienne Lantagne-Hurtubise, Roger G. Melko, Tiffany J. Vlaar Shape dependence of two-cylinder Renyi entropies for free bosons on a lattice Phys. Rev. B 94, 165136 (2016) arXiv: 1607.05311
  • Ipsita Mandal, Stephen Inglis, Roger G. Melko Geometrical mutual information at the tricritical point of the two-dimensional Blume-Capel model J. Stat. Mech. (2016) 073105 arXiv: 1604.02464
  • Johannes Helmes, Lauren E. Hayward Sierens, Anushya Chandran, William Witczak-Krempa, Roger G. Melko Universal corner entanglement of Dirac fermions and gapless bosons from the continuum to the lattice Phys. Rev. B (in press) arXiv: 1606.03096
  • C. M. Herdman, P.-N. Roy, R. G. Melko, A. Del Maestro Spatial entanglement entropy in the ground state of the Lieb-Liniger model Phys. Rev. B (in press) arXiv: 1606.03396
  • Yuan Wan, Juan Carrasquilla, Roger G. Melko Spinon walk in quantum spin ice Phys. Rev. Lett. 116, 167202 (2016) arXiv: 1510.00979
  • S. A. Owerre, A. A. Burkov, Roger G. Melko A Large-S Study of Quantum Kagome Ice Phys. Rev. B 93, 144402 (2016) arXiv: 1512.03930
  • R. G. Melko, C. M. Herdman, D. Iouchtchenko, P.-N. Roy, A. Del Maestro Entangling qubit registers via many-body states of ultra cold atoms Phys. Rev. A 93, 042336 (2016) arXiv: 1512.06462
  • Sharmistha Sahoo, E. Miles Stoudenmire, Jean-Marie Stéphan, Trithep Devakul, Rajiv R. P. Singh, Roger G. Melko Unusual Corrections to Scaling and Convergence of Universal Renyi Properties at Quantum Critical Points Phys. Rev. B 93, 085120 (2016) arXiv: 1509.00468
  • Juan Carrasquilla, Zhihao Hao and Roger G. Melko A two-dimensional spin liquid in quantum kagome ice Nature Communications 6, Article number: 7421 http://arxiv.org/abs/1407.0037
  • Jean-Marie Stéphan, Stephen Inglis, Paul Fendley, Roger G. Melko Geometric mutual information at classical critical points Phys. Rev. Lett. 112, 127204 (2014) arXiv: 1312.3954
  • Lauren E. Hayward, David G. Hawthorn, Roger G. Melko, Subir Sachdev Angular Fluctuations of a Multicomponent Order Describe the Pseudogap of YBa2Cu3O6+x Science 343, 1336 (2014) arXiv: 1309.6639
  • Matthew B. Hastings, Grant H. Watson, Roger G. Melko Self-Correcting Quantum Memories Beyond the Percolation Threshold Phys. Rev. Lett. 112, 070501 (2014) arXiv: 1309.2680
  • Matthew S. Block, Roger G. Melko, Ribhu K. Kaul Fate of CP(N-1) fixed points with q-monopoles Phys. Rev. Lett. 111, 137202 (2013) arXiv: 1307.0519
  • Ribhu K. Kaul, Roger G. Melko, Anders W. Sandvik Bridging lattice-scale physics and continuum field theory with quantum Monte Carlo simulations Annu. Rev. Con. Mat. Phys. 4, 179 (2013) arXiv: 1204.5405
  • Ann B. Kallin, Katharine Hyatt, Rajiv R. P. Singh, Roger G. Melko, Entanglement at a Two-Dimensional Quantum Critical Point: a Numerical Linked Cluster Expansion Study, Phys. Rev. Lett. 110, 135702 (2013), arXiv: 1212.5269
  • Alan Morningstar, Roger G. Melko Deep Learning the Ising Model Near Criticality arXiv: 1708.04622
  • Yi Zhang, Roger G. Melko, Eun-Ah Kim Machine Learning ℤ2 Quantum Spin Liquids with Quasi-particle Statistics arXiv: 1705.01947
  • Pedro Ponte, Roger G. Melko Kernel methods for interpretable machine learning of order parameters arXiv: 1704.05848
  • Giacomo Torlai, Guglielmo Mazzola, Juan Carrasquilla, Matthias Troyer, Roger Melko, Giuseppe Carleo Many-body quantum state tomography with neural networks arXiv: 1703.05334
  • Kelvin Ch'ng, Juan Carrasquilla, Roger G. Melko, Ehsan Khatami Machine Learning Phases of Strongly Correlated Fermions Accepted for publication in PRX arXiv: 1609.02552
  • Mohammad H. Amin, Evgeny Andriyash, Jason Rolfe, Bohdan Kulchytskyy, Roger Melko Quantum Boltzmann Machine arXiv: 1601.02036
  • Strongly Correlated Systems: Numerical Methods Chapter 7: Stochastic Series Expansion Quantum Monte Carlo By Roger Melko Springer Series in Solid-State Sciences Volume 176, 2013, pp 185-206

Seminars

  • Machine Learning the Many-Body Problem Boston University
  • Machine Learning the Many-Body Problem University of Maryland
  • Machine Learning the Many-Body Problem University of Chicago
  • Colloquium: Machine Learning the Many-Body Problem University of Cologne
  • Machine Learning Quantum Physics Seminar: Machine Learning Advances and Applications Fields Institute Toronto
  • Machine Learning Quantum Physics Seminar: Machine Learning Advances and Applications Fields Institute, Toronto
  • Colloquium: Machine Learning the Many-Body Problem University of Toronto
  • Machine Learning for the Many-Body Problem University de Montreal
  • Colloquium: Machine Learning the Many-Body Problem University of North Carolina at Chapel Hill
  • Machine Learning for the Many-Body Problem KITP, Santa Barbara
  • Quantum Computing: State of the Science and the Future Scotiabank Toronto
  • Boulder Summer School for Condensed Matter and Materials Physics Topological Phases of Quantum Matter Boulder CO
  • Computational Quantum Matter Summer School Sherbrooke
  • Entanglement Matters Aspen summer workshop
  • Plenary speaker, Canadian Association of Physicists Congress Ottawa ON
  • From Quantum Field Theories to Numerical Methods NORDITA Sweden
  • Colloquium:The Information Age in Simulations of Condensed Matter Northwestern University
  • Turning the corner on Entanglement Entropy Oxford UK
  • PIRSA:17040003, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 28, 2017-04-07, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17040002, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 27, 2017-04-05, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17030010, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 26, 2017-03-31, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17030009, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 25, 2017-03-29, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17030008, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 24, 2017-03-24, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17030007, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 23, 2017-03-22, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17030006, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 22, 2017-03-17, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17030005, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 21, 2017-03-15, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17030004, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 20, 2017-03-10, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17030003, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 19, 2017-03-08, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17030002, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 18, 2017-03-03, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17030001, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 17, 2017-03-01, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17020009, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 16, 2017-02-24, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17020008, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 15, 2017-02-22, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17020007, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 14, 2017-02-17, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17020006, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 13, 2017-02-15, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17020005, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 12, 2017-02-10, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17020004, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 11, 2017-02-08, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17020003, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 10, 2017-02-03, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17020002, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 9, 2017-02-01, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17010054, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 8, 2017-01-27, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17010053, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 7, 2017-01-25, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17010052, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 6, 2017-01-20, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17010051, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 5, 2017-01-18, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17010050, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 4, 2017-01-13, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17010049, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 3, 2017-01-11, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17010048, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 2, 2017-01-06, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:17010047, 2016/2017 Statistical Mechanics 2 - Roger Melko - Lecture 1, 2017-01-04, 2016/2017 PHYS 705 - Statistical Mechanics 2 - Roger Melko
  • PIRSA:16080000, Welcome and Opening Remarks, 2016-08-08, Quantum Machine Learning
  • PIRSA:16030035, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 24, 2016-03-31, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16030034, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 23, 2016-03-29, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16030033, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 22, 2016-03-24, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16030032, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 21, 2016-03-22, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16030031, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 20, 2016-03-17, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16030030, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 19, 2016-03-15, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16030029, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 18, 2016-03-10, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16030028, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 17, 2016-03-08, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16030027, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 16, 2016-03-03, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16030026, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 15, 2016-03-01, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16020019, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 14, 2016-02-25, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16020018, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 13, 2016-02-23, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16020015, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 12, 2016-02-11, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16020014, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 11, 2016-02-09, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16020013, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 10, 2016-02-04, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16020012, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 9, 2016-02-02, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16010038, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 8, 2016-02-02, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16010037, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 7, 2016-01-26, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16010036, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 6, 2016-01-21, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16010035, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 5, 2016-01-19, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16010034, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 4, 2016-01-14, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16010033, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 3, 2016-01-12, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16010032, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 2, 2016-01-07, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:16010031, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko - Lecture 1, 2016-01-05, PHYS 733 - Quantum Many-Body Physics (W2016) - Roger Melko
  • PIRSA:15020090, Quantum Materials Research is Humanity's Only Hope, 2015-02-27, Universe in 60 Minutes
  • PIRSA:14020110, Welcome, 2014-02-10, Emergence in Complex Systems
  • PIRSA:13110045, 13/14 PSI - Condensed Matter - Lecture 15, 2013-11-29, 13/14 PSI - Condensed Matter
  • PIRSA:13110044, 13/14 PSI - Condensed Matter - Lecture 14, 2013-11-28, 13/14 PSI - Condensed Matter
  • PIRSA:13110043, 13/14 PSI - Condensed Matter - Lecture 13, 2013-11-27, 13/14 PSI - Condensed Matter
  • PIRSA:13110042, 13/14 PSI - Condensed Matter - Lecture 12, 2013-11-26, 13/14 PSI - Condensed Matter
  • PIRSA:13110041, 13/14 PSI - Condensed Matter - Lecture 11, 2013-11-25, 13/14 PSI - Condensed Matter
  • PIRSA:13110038, 13/14 PSI - Condensed Matter - Lecture 10, 2013-11-22, 13/14 PSI - Condensed Matter
  • PIRSA:13110037, 13/14 PSI - Condensed Matter - Lecture 9, 2013-11-21, 13/14 PSI - Condensed Matter
  • PIRSA:13110036, 13/14 PSI - Condensed Matter - Lecture 8, 2013-11-20, 13/14 PSI - Condensed Matter
  • PIRSA:13110035, 13/14 PSI - Condensed Matter - Lecture 7, 2013-11-19, 13/14 PSI - Condensed Matter
  • PIRSA:13110034, 13/14 PSI - Condensed Matter - Lecture 6, 2013-11-18, 13/14 PSI - Condensed Matter
  • PIRSA:13110031, 13/14 PSI - Condensed Matter - Lecture 5, 2013-11-15, 13/14 PSI - Condensed Matter
  • PIRSA:13110030, 13/14 PSI - Condensed Matter - Lecture 4, 2013-11-14, 13/14 PSI - Condensed Matter
  • PIRSA:13110029, 13/14 PSI - Condensed Matter - Lecture 3, 2013-11-13, 13/14 PSI - Condensed Matter
  • PIRSA:13110028, 13/14 PSI - Condensed Matter - Lecture 2, 2013-11-12, 13/14 PSI - Condensed Matter
  • PIRSA:13110027, 13/14 PSI - Condensed Matter - Lecture 1, 2013-11-11, 13/14 PSI - Condensed Matter
  • PIRSA:13110071, Entanglement at strongly-interacting quantum critical points, 2013-11-07, PI-UIUC 2013
  • PIRSA:13050051, Entanglement at strongly-interacting quantum critical points in 2+1D, 2013-05-10, Emergence & Entanglement II 2013
  • PIRSA:12050039, Spin liquid and Deconfined Criticality in a Kagome Lattice Bose-Hubbard Model, 2012-05-03, 4 Corner Southwest Ontario Condensed Matter Physics Symposium 2012
  • PIRSA:12010114, Simulating Fractionalization in Quantum Spin Liquids, 2012-01-18, Colloquium
  • PIRSA:10050070, Computing Entanglement in Simulations of Quantum Condensed Matter, 2010-05-26, Emergence and Entanglement - 2010
  • PIRSA:08040036, Computing Unconventional Quantum Phase Transitions, 2008-04-24, Southwestern Ontario 4-Corner Condensed Matter Symposium - 2008