Andrew Hardy

ORCID: 0000-0002-3581-7382
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About
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Research Areas
  • Physics of Superconductivity and Magnetism
  • Advanced Condensed Matter Physics
  • Theoretical and Computational Physics
  • Quantum Information and Cryptography
  • Topological Materials and Phenomena
  • Iron-based superconductors research
  • Advanced Fluorescence Microscopy Techniques
  • Magnetic properties of thin films
  • Rare-earth and actinide compounds
  • Quantum Mechanics and Applications
  • Quantum and electron transport phenomena
  • Chemical and Physical Properties of Materials
  • Microstructure and mechanical properties
  • Quantum many-body systems
  • Cold Atom Physics and Bose-Einstein Condensates
  • Liquid Crystal Research Advancements
  • Graphene research and applications
  • Metallurgy and Cultural Artifacts
  • Advanced X-ray Imaging Techniques
  • Anatomy and Medical Technology
  • Powder Metallurgy Techniques and Materials

University of Toronto
2023-2025

Flatiron Health (United States)
2025

Flatiron Institute
2025

Brookhaven National Laboratory
2020

Abstract Scalable technologies to characterize the performance of quantum devices are crucial creating large networks and processing units. Chief among resources information is entanglement. Here we describe full temporal spatial characterization polarization-entangled photons produced by Spontaneous Parametric Down Conversions using an intensified high-speed optical camera, Tpx3Cam. This novel technique allows for precise determination Bell inequality parameters with minimal technical...

10.1038/s41598-020-62020-z article EN cc-by Scientific Reports 2020-04-10

We solve a model of electrons with Hubbard-U Coulomb repulsion and random Yukawa coupling to two-dimensional bosonic bath, using an extended dynamical mean field theory scheme. Our exhibits quantum critical point, at which the repulsive component electron interactions strongly enhances effects fluctuations on electrons, leading breakdown Fermi liquid physics formation strange metal "Planckian" [O(kBT/ℏ)] quasiparticle decay rates low temperatures T→0. Furthermore, eventual Mott transition...

10.1103/physrevlett.134.036502 article EN Physical Review Letters 2025-01-23

We propose and study a two-orbital lattice extension of the Sachdev-Ye-Kitaev model in large- N limit. The phase diagram this features high-temperature isotropic non-Fermi liquid which undergoes first-order thermal transition into nematic insulator or continuous metal phase, separated by tunable tricritical point. These phases arise from spontaneous partial orbital polarization multiorbital liquid. explore spectral transport properties model, including d.c. elastoresistivity, exhibits peak...

10.1073/pnas.2207903120 article EN cc-by-nc-nd Proceedings of the National Academy of Sciences 2023-01-05

Scalable technologies to characterize the performance of quantum devices are crucial creating large networks and processing units. Chief among resources information is entanglement. Here we describe full temporal spatial characterization polarization-entangled photons produced by Spontaneous Parametric Down Conversions using an intensified high-speed optical camera, Tpx3Cam. This novel technique allows for precise determination Bell inequality parameters with minimal technical overhead, as...

10.48550/arxiv.1808.06720 preprint EN other-oa arXiv (Cornell University) 2018-01-01

Motivated by systems where a high temperature non-Fermi liquid gives way to low $\mathbb{Z}_3$ Potts nematic order, we studied three-orbital Sachdev-Ye-Kitaev (SYK) model in the large-$N$ limit. In single-site limit, this exhibits spontaneous orbital-selective transition which preserves average particle-hole symmetry, with two orbitals becoming insulators while third orbital remains down zero temperature. We extend study lattice models of SYK dots, exploring uniform symmetry broken states on...

10.48550/arxiv.2402.16952 preprint EN arXiv (Cornell University) 2024-02-26

We solve a model of electrons with Hubbard-$U$ Coulomb repulsion and random Yukawa coupling to two-dimensional bosonic bath, using an extended dynamical mean field theory scheme. Our exhibits quantum critical point, at which the repulsive component electron interactions strongly enhances effects fluctuations on electrons, leading breakdown Fermi liquid physics formation strange metal `Planckian' ($\mathcal{O}(k_B T/\hbar)$) quasiparticle decay rates low temperatures $T\rightarrow 0$....

10.48550/arxiv.2407.21102 preprint EN arXiv (Cornell University) 2024-07-30

Magnetic skyrmion crystals with zero net charge and topological Hall response are interesting candidate phases which can occur at a vanishing magnetic field in centrosymmetric systems. We study minimal bilayer model of having opposite chirality the two layers, show that it host nearly flat electronic bands quasi-uniform Berry curvature quantum metric. Using Hartree-Fock theory, we weak to moderate short-range electron interactions induce distinct types symmetry breaking patterns depending on...

10.48550/arxiv.2409.04520 preprint EN arXiv (Cornell University) 2024-09-06

Electronic liquid crystals are ubiquitous in strongly correlated matter, and often seen multiorbital materials exhibiting non-Fermi-liquid transport. The authors propose here analyze a three-orbital Sachdev-Ye-Kitaev model that hosts uniform solution corresponding to \ensuremath{\mathbb{Z}}${}_{3}$ Potts nematic. In the atomic limit, this displays an orbital-selective non-Fermi down $T$=0. On triangular cubic lattice, evolves into nematic with highly anisotropic transport, reminiscent of...

10.1103/physrevb.110.165158 article EN Physical review. B./Physical review. B 2024-10-23

We study a class of multiorbital models based on those proposed by Venderbos et al. [Phys. Rev. B 98, 235160 (2018)] which exhibit an interplay topology, interactions, and fermion incoherence. In the noninteracting limit, these trivial Chern insulator phases with number $C\ensuremath{\ge}1$ bands as determined relative angular momentum participating orbitals. These quantum anomalous Hall are separated topological transitions protected crystalline rotation symmetry, featuring Dirac or...

10.1103/physrevb.108.235169 article EN Physical review. B./Physical review. B 2023-12-26

We propose and study a two-orbital lattice extension of the Sachdev-Ye-Kitaev model in large-$N$ limit. The phase diagram this features high temperature isotropic strange metal which undergoes first-order thermal transition into nematic insulator or continuous phase, separated by tunable tricritical point. These phases arise from spontaneous partial orbital polarization multiorbital non-Fermi liquid. explore spectral transport properties model, including d.c. elastoresistivity, exhibits peak...

10.48550/arxiv.2203.11221 preprint EN other-oa arXiv (Cornell University) 2022-01-01
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