Conveners
W1-8 Condensed Matter Theory I (DCMMP/DTP) | Théorie de la matière condensée I (DPMCM/DPT)
- Olivia Di Matteo (The University of British Columbia)
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Dr Meenu Kumari (Perimeter Institute for Theoretical Physics)08/06/2022, 10:45Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)Oral (Non-Student) / Orale (non-étudiant(e))
The characterization of integrability and chaos in quantum mechanics is a long-standing open problem. Entanglement is a strong candidate for this characterization but exactly how remains debatable. The average entanglement entropy (EE) of the energy eigenstates in non-vanishing partitions has been recently proposed as a diagnostic of integrability in quantum many-body systems. For it to be a...
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Olivia Di Matteo (The University of British Columbia)08/06/2022, 11:00Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)Oral (Non-Student) / Orale (non-étudiant(e))
Fidelity susceptibility is a physical quantity that can be used to study quantum phase transitions in a variety of condensed matter models. The closed-form expression of this quantity requires knowledge of the energy spectrum of a Hamiltonian; however it has been previously shown that it can also be computed from second-order derivatives of overlaps involving the ground state wave function. We...
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Prof. Igor Boettcher (University of Alberta)08/06/2022, 11:15Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)Oral (Non-Student) / Orale (non-étudiant(e))
We introduce the theory of hyperbolic matter, a novel paradigm for topological states made from particles moving in the infinite two-dimensional hyperbolic plane. Negative curvature of space is emulated through a hyperbolic lattice. Utilizing topoelectric circuit networks relying on a newly developed complex-phase circuit element, we experimentally realize hyperbolic graphene as an example of...
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Thomas Baker08/06/2022, 11:30Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)Oral (Non-Student) / Orale (non-étudiant(e))
Matrix product state methods are known to be efficient for computing ground states of local, gapped Hamiltonians, particularly in one dimension. We introduce the multi-targeted method that acts on a bundled matrix product state, holding many excitations. The use of a block or banded Lanczos algorithm allows for the simultaneous, variational optimization of the bundle of excitations. The...
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Jonathon Riddell (McMaster University)08/06/2022, 11:45Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)
We investigate early-time equilibration rates of observables in closed many-body quantum systems
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and compare them to those of two correlation functions, first introduced by Kubo and Srednicki.
We explore whether these different rates coincide at a universal value that sets the timescales
of processes at a finite energy density. We find evidence for this coincidence when the... -
Shuaishuai Yuan (Division of Materials Engineering, Faculty of Engineering, McGill University)08/06/2022, 12:00Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)
Electron-driven lattice rearrangements commonly exist in phenomena such as electron/hole transfer, defect ionization, photoexcitation, and polaron formation. These phenomena are manifested in a variety of important technologies employing energy harvesting and conversion materials. Hence, lattice equilibration processes at the atomic scale need to be more deeply understood in order to tailor...
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