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2026 Theory Canada 18

19–20 Jun 2026
Université de Montréal (MIL campus)
Canada/Central timezone

Simon Caron-Huot

Session

Condensed Matter Theory

19 Jun 2026, 11:15
A-4502.1 (Université de Montréal (MIL campus))

A-4502.1

Université de Montréal (MIL campus)

1375 Avenue Thérèse-Lavoie-Roux, Montréal (QC) H2V 0B3

Presentation materials

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  1. 64. Exact critical-temperature bounds for two-dimensional Ising models
    Prof. Igor Boettcher (University of Alberta)
    19/06/2026, 11:15
    Condensed Matter Theory
    Contributed Talk

    We derive exact critical-temperature bounds for the classical ferromagnetic Ising model on two-dimensional periodic tessellations of the plane. For any such tessellation or lattice, the critical temperature is bounded from a above by a universal number that is solely determined by the largest coordination number on the lattice. Crucially, these bounds are tight in some cases such as the...

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  2. 79. Unconventional Ginzburg-Landau theory: a common pathway to novel physics
    Prof. Kirill Samokhin (Brock University)
    19/06/2026, 11:35
    Condensed Matter Theory
    Contributed Talk

    I will review several recent developments in the GL theory of superconductors and fermionic superfluids. In superconductors without inversion symmetry, first-order gradient terms known as the Lifshitz invariants appear in the GL functional in the presence of a magnetic field or even without any field, leading to a variety of novel nonuniform stable states. In multiband superconductors, the...

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  3. 57. Magnetic long-range order at finite temperature in two-dimensional hyperbolic lattices
    Alexander Hickey (University of Alberta)
    19/06/2026, 11:55
    Condensed Matter Theory
    Contributed Talk

    Infrared singularities of gapless Goldstone modes preclude magnetic long-range order at finite temperature in conventional two-dimensional systems. We show that this obstruction is avoided on lattices in negatively curved space by considering the spin-$S$ Heisenberg model on regular tilings of the hyperbolic plane. Using spin wave theory, we find that the global symmetry mode is separated from...

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  4. 62. Bulk-Boundary Correspondence for Semi-Infinite One-Dimensional Topological Insulators from Exceptional Points of the Analytically Continued Bloch Hamiltonian
    Ilya Iakoub (Université de Montréal)
    19/06/2026, 12:15
    Condensed Matter Theory
    Contributed Talk

    The concept of bulk-boundary correspondence is essentially that the existence of edge states in topological insulators can be predicted from topological invariants of the bulk. The existing proofs of bulk-boundary correspondence in one dimension are usually not very physically insightful and rely on very involved mathematics. We provide a novel formulation of bulk-boundary correspondence for...

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  5. 82. High-Performance Computational Modeling of Optical Turbulence and Discrete-Time Chaos in the Ikeda Map
    Rahul Nivash
    20/06/2026, 11:15
    1
    Condensed Matter Theory
    Contributed Talk

    Experimental data demonstrates that continuous-wave (CW) theories of non-linear optics do not accurately model the optical turbulence (chaos) arising from delayed discrete feedback in nonlinear optical ring cavities (Ikeda, 1979). To accurately predict this onset of optical turbulence within a ring cavity, this study implements a high-performance computational architecture simulating the...

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  6. 55. A study of new types of states in generalized SSH systems
    Kylian Lionnet
    20/06/2026, 11:35
    Condensed Matter Theory
    Contributed Talk

    Recent advances in topological condensed matter physics have highlighted the importance of simple one-dimensional lattice models as building blocks for understanding more complex quantum systems. In particular, the Su–Schrieffer–Heeger (SSH) model has become a paradigmatic example of how topology controls the existence and robustness of eigenstates in low-dimensional systems. However, when the...

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  7. 65. Signatures of electronic band topology in the electrostatics of Chern insulator junctions
    Ion Garate
    20/06/2026, 11:55
    Condensed Matter Theory
    Contributed Talk

    Electrostatic control is central to the operation of semiconductor
    junctions, but its interplay with band topology remains largely
    unexplored. We investigate lateral junctions between two-dimensional
    insulating phases with different Chern numbers in a perpendicular
    magnetic field. From the electrostatic point of view, the spectral asymmetry of the Chern insulator acts as an intrinsic...

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  8. 66. Unconventional Pairing in interacting Ladders
    Sourav Biswas (University of Alberta)
    20/06/2026, 12:15
    Condensed Matter Theory
    Contributed Talk

    The platforms hosting synthetic quantum matter are known to exhibit a plethora of exotic many-body phenomena. The possibility of engineering different types of interactions and couplings has attracted significant attention, enabling the exploration of a variety of strongly correlated phases that are otherwise difficult to investigate. We are particularly interested in the nuances of...

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