Precision Many Body Physics III: New Theoretical Techniques and Results I

FOCUS · Y59 · ID: 2155746

Presentations

  • On the Positive Definiteness of Green's functions

    ORAL

    –

    Publication: arXiv:2309.02566

    Presenters

    • Emanuel C Gull

      University of Michigan

    Authors

    • Emanuel C Gull

      University of Michigan

    • Alexander F Kemper

      North Carolina State University

    • Chao Yang

      Lawrence Berkeley Laboratory, Lawrence Berkeley National Laboratory, Lawrence Berkeley national lab

    View abstract →

  • Efficient imaginary time calculations using the discrete Lehmann representation

    ORAL

    –

    Publication: J. Kaye, K. Chen, O. Parcollet, "Discrete Lehmann representation of imaginary time Green's functions", Phys. Rev. B, 105, 235115 (2022).
    J. Kaye, K. Chen, H. U. R. Strand, "libdlr: Efficient imaginary time calculations using the discrete Lehmann representation", Comput. Phys. Commun., 280, 108458 (2022).
    J. Kaye, H. U. R. Strand, N. Wentzell, "cppdlr: Imaginary time calculations using the discrete Lehmann representation", Submitted to JOSS (2023).

    Presenters

    • Jason Kaye

      Flatiron Institute, Flatiron Institute, Simons Foundation

    Authors

    • Jason Kaye

      Flatiron Institute, Flatiron Institute, Simons Foundation

    • Kun Chen

      Flatiron Institute, Center for Computational Quantum Physics

    • Olivier P Parcollet

      Flatiron Institute, Simons Foundation

    • Hugo U Strand

      Örebro University, School of Science and Technology, Örebro University

    • Nils Wentzell

      Flatiron Institute, Simons Foundation

    View abstract →

  • Fast evaluation of imaginary-time Feynman diagrams via sum-of-exponentials expansions

    ORAL

    –

    Publication: J. Kaye, H. U. R. Strand, D. Golež, "Decomposing imaginary time Feynman diagrams using separable basis functions: Anderson impurity model strong coupling expansion", arXiv:2307.08566
    Another paper in preparation.

    Presenters

    • Zhen Huang

      University of California, Berkeley

    Authors

    • Zhen Huang

      University of California, Berkeley

    • Jason Kaye

      Flatiron Institute, Flatiron Institute, Simons Foundation

    • Hugo U Strand

      Örebro University, School of Science and Technology, Örebro University

    • Denis Golez

      Jozef Stefan Institute, Jožef Stefan Institute and Faculty of Mathematics and Physics, University of Ljubljana, Jožef Stefan Institute

    View abstract →

  • Dynamical correlation function from complex time evolution

    ORAL

    –

    Presenters

    • Olivier P Parcollet

      Flatiron Institute, Simons Foundation

    Authors

    • Olivier P Parcollet

      Flatiron Institute, Simons Foundation

    • Xiaodong Cao

      Flatiron Institute

    • Miles Stoudenmire

      Flatiron Institute, Flatiron Institute, Simons Foundation

    • Yi Lu

      Nanjing University

    View abstract →

  • Using a many-body technique to solve a one-body problem

    ORAL

    –

    Publication: Tensorized orbitals for computational chemistry
    Nicolas Jolly, Yuriel Núñez Fernández, Xavier Waintal
    https://doi.org/10.48550/arXiv.2308.03508

    Presenters

    • Xavier Waintal

      Université Grenoble Alpes, CEA, Grenoble INP, IRIG, Pheliqs, Grenoble Alpes University, CEA Pheliqs

    Authors

    • Xavier Waintal

      Université Grenoble Alpes, CEA, Grenoble INP, IRIG, Pheliqs, Grenoble Alpes University, CEA Pheliqs

    • Yuriel Núñez Fernández

      Université Grenoble Alpes, CEA, Grenoble INP, IRIG, Pheliqs, Neel institute

    • Nicolas Jolly

      CEA Grenoble

    View abstract →

  • SmoQyDEAC.jl: an analytic continuation package for Matsubara correlation functions

    ORAL

    –

    Presenters

    • James C Neuhaus

      University of Tennessee

    Authors

    • James C Neuhaus

      University of Tennessee

    • Nathan S Nichols

      University of Vermont

    • Debshikha Banerjee

      University of Tennessee Knoxville, University of Tennessee. Knoxville

    • Benjamin Cohen-Stead

      University of Tennessee Knoxville

    • Thomas A Maier

      Oak Ridge National Laboratory

    • Adrian G Del Maestro

      University of Tennessee

    • Steven S Johnston

      University of Tennessee

    View abstract →

  • Quantics Tensor Cross Interpolation for High-Resolution, Parsimonious Representations of Multivariate Functions in Physics and Beyond

    ORAL

    –

    Publication: M. K. Ritter, Y. Núñez Fernández, M. Wallerberger, J. von Delft, H. Shinaoka, and X. Waintal, Quantics Tensor Cross Interpolation for High-Resolution, Parsimonious Representations of Multivariate Functions in Physics and Beyond, arXiv:2303.11819.
    Yuriel Núñez Fernández, Marc K. Ritter, Matthieu Jeannin, Jheng-Wei Li, Thomas Kloss, Olivier Parcollet, Jan von Delft, Hiroshi Shinaoka and Xavier Waintal: Learning low rank tensor train representations: new algorithms and the xfac library, to be submitted to SciPost Physics Codebases.

    Presenters

    • Marc K Ritter

      Ludwig-Maximilians-Universitaet (LMU-Munich)

    Authors

    • Marc K Ritter

      Ludwig-Maximilians-Universitaet (LMU-Munich)

    • Yuriel Núñez Fernández

      Université Grenoble Alpes, CEA, Grenoble INP, IRIG, Pheliqs, Neel institute

    • Markus Wallerberger

      Vienna Univ of Technology

    • Jan von Delft

      Ludwig-Maximilians-Universitaet (LMU-Mun

    • Hiroshi Shinaoka

      Saitama Univ, Saitama Univ.

    • Xavier Waintal

      Université Grenoble Alpes, CEA, Grenoble INP, IRIG, Pheliqs, Grenoble Alpes University, CEA Pheliqs

    View abstract →