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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 (Université de Montréal (MIL campus))

A-4502

Université de Montréal (MIL campus)

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

Conveners

Condensed Matter Theory: I

  • Igor Boettcher (University of Alberta)

Condensed Matter Theory: III

  • Kirill Samokhin (Brock University)

Presentation materials

There are no materials yet.

  1. 79. Unconventional Ginzburg-Landau theory: a common pathway to novel physics
    Prof. Kirill Samokhin (Brock University)
    19/06/2026, 11:15
    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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  2. 57. Magnetic long-range order at finite temperature in two-dimensional hyperbolic lattices
    Alexander Hickey (University of Alberta)
    19/06/2026, 11:35
    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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  3. 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, 11:55
    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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  4. 85. Finite-Size Effects in Quantum Metrology at Strong Coupling: Microscopic vs Phenomenological Approaches
    Ali Pedram (University of Calgary)
    19/06/2026, 12:15
    Quantum Information
    Contributed Talk

    Equilibrium quantum metrology is often formulated under assumptions of weak system-bath coupling and thermodynamic limit scaling, which may not be valid for realistic finite-size (FS) quantum devices. Here, we establish how strong coupling (SC) and FS effects jointly modify achievable precision bounds for equilibrium quantum probes. Considering a transverse-field anisotropic XY spin chain...

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  5. 66. Unconventional Pairing in interacting Ladders
    Sourav Biswas (University of Alberta)
    20/06/2026, 11:15
    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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  6. 65. Signatures of electronic band topology in the electrostatics of Chern insulator junctions
    Ion Garate
    20/06/2026, 11:35
    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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  7. 55. A study of new types of states in generalized SSH systems
    Kylian Lionnet
    20/06/2026, 11:55
    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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  8. 44. Equation of State under External Stress from Crystals to Non-crystals
    Gang Liu
    20/06/2026, 12:15
    Condensed Matter Theory
    Contributed Talk

    The rigorous Equation of State of any material under external isotropic pressure $P$:

    $ \hspace{2.5cm} P =\frac {1}{\beta} \frac {\partial \ln Z}{\partial V}, $

    based on the system partition function $Z$, is taught in almost every related textbook.

    The Equation of State of crystals under general external stress $\mathbf{S}$ was derived:

    $...

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