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  1. Comprehensive study of out-of-equilibrium Kondo effect and Coulomb blockade

    Publication
    We present a comprehensive set of numerically exact results for the Anderson model of a quantum dot coupled to two electrodes in non-equilibrium regime. We use a …

  2. Inchworm tensor train hybridization expansion quantum impurity solver

    Publication
    The investigation of quantum impurity models plays a crucial role in condensed matter physics because of their wide-ranging applications, such as embedding theories and transport problems. Traditional …

  3. Hund’s flat band in a frustrated spinel oxide

    Publication
    … long-standing puzzle on the origin of heavy fermion behavior and unconventional transport in LiV2O4. Simultaneously, it opens a path to achieving flat bands through electronic interactions …

  4. CTSEG: A segment picture quantum impurity solver based on TRIQS

    Publication
    Electron-electron interactions are a key determinant of the electrical and optical response properties in solid-state materials. Yet, the many-electron problem is outstandingly difficult, and can …

  5. Discrete Lehmann representation of three-point functions

    Publication
    We present a generalization of the discrete Lehmann representation (DLR) to three-point correlation and vertex functions in imaginary time and Matsubara frequency. The representation takes the form …

  6. Enhanced Strange Metallicity due to Hubbard-U Coulomb Repulsion

    Publication

  7. Embedded multi-boson exchange: A step beyond quantum cluster theories

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  8. Cross-extrapolation reconstruction of low-rank functions and application to quantum many-body observables in the strong coupling regime

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  9. Cross-extrapolation reconstruction of low-rank functions and application to quantum many-body observables in the strong coupling regime

    Publication

  10. Finite Temperature Minimal Entangled Typical Thermal States Impurity Solver

    Publication
    We present a minimally entangled typical thermal state quantum impurity solver for general multiorbital systems at finite temperatures. We introduce an improved estimator for the single-particle Green …

  11. Dynamical correlation functions from complex time evolution

    Publication
    We present an approach to tame the growth of entanglement during time evolution by tensor network methods. It combines time evolution in the complex plane with a perturbative …

  12. An algorithm for computing perturbation series of dynamical mean field theory

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  13. Learning tensor networks with tensor cross interpolation: new algorithms and libraries

    Publication

  14. LiV2O4: Hund-Assisted Orbital-Selective Mottness

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  15. LiV2O4: Hund-Assisted Orbital-Selective Mottness

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  16. Learning tensor networks with tensor cross interpolation: new algorithms and libraries

    Publication

  17. Equilibrium quantum impurity problems via matrix product state encoding of the retarded action

    Publication
    In the 0 + 1 -dimensional imaginary-time path integral formulation of quantum impurity problems, the retarded action encodes the hybridization of the impurity with the bath. In this …

  18. Low rank Green's function representations applied to dynamical mean-field theory

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  19. Frequency-Dependent Superconducting States From the Two-Time Linear Response Theory: Application To Sr

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  20. Exact numerical solution of the classical and quantum Heisenberg spin glass

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  21. Variational Benchmarks for Quantum Many-Body Problems

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  22. Exact numerical solution of the classical and quantum Heisenberg spin glass

    Publication

  23. Learning Feynman Diagrams with Tensor Trains

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  24. Discrete Lehmann representation of imaginary time Green's functions

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    We present an efficient basis for imaginary time Green's functions based on a low rank decomposition of the spectral Lehmann representation. The basis functions are simply a …

  25. Discrete Lehmann representation of imaginary time Green's functions

    Publication

  26. Automatic, high-order, and adaptive algorithms for Brillouin zone integration

    Publication

  27. Tracking the Footprints of Spin Fluctuations: A Multi-Method, Multi-Messenger Study of the Two-Dimensional Hubbard Model

    Publication
    The Hubbard model represents the fundamental model for interacting quantum systems and electronic correlations. Using the two-dimensional half-filled Hubbard model at weak coupling as testing grounds …

  28. Planckian Metal at a Doping-Induced Quantum Critical Point

    Publication
    We numerically study a model of interacting spin-\(1/2\) electrons with random exchange coupling on a fully connected lattice. This model hosts a quantum critical point separating …

  29. Charge self-consistent electronic structure calculations with dynamical mean-field theory using Quantum ESPRESSO, Wannier90 and TRIQS

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  30. Sachdev-Ye-Kitaev Models and Beyond: A Window into Non-Fermi Liquids

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  31. Inter-orbital singlet pairing in Sr

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  32. Minimally Entangled Typical Thermal States Algorithms for Finite Temperature Matsubara Green Functions

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  33. Quantum Quasi-Monte Carlo algorithm for out-of-equilibrium Green functions at long times

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  34. Quantum Quasi-Monte Carlo Technique for Many-Body Perturbative Expansions

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    High order perturbation theory has seen an unexpected recent revival for controlled calculations of quantum many-body systems, even at strong coupling. We adapt integration methods using low …

  35. Imaginary-time matrix product state impurity solver in a real material calculation: Spin-orbit coupling in Sr2RuO4

    Publication
    Using an imaginary-time matrix-product state (MPS) based quantum impurity solver we perform a realistic dynamical mean-field theory (DMFT) calculation combined with density functional theory (DFT …

  36. A Quantum Monte Carlo algorithm for out-of-equilibrium Green's functions at long times

    Publication

  37. Magnetic response of Sr2RuO4: quasi-local spin fluctuations due to Hund's coupling

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    We study the magnetic susceptibility in the normal state of Sr2RuO4 using dynamical mean-field theory including dynamical vertex corrections. Besides the well known incommensurate response, our calculations …

  38. Hall coefficient signals orbital differentiation in the Hund’s metal Sr2RuO4

    Publication
    The Hall coefficient RH of Sr2RuO4 exhibits a non-monotonic temperature dependence with two sign reversals. We show that this puzzling behavior is the signature of two crossovers …

  39. Enhancement of Local Pairing Correlations in Periodically Driven Mott Insulators

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    We investigate a model for a Mott insulator in presence of a time-periodic modulated interaction and a coupling to a thermal reservoir. The combination of drive and …

  40. Reconstructing non-equilibrium regimes of quantum many-body systems from the analytical structure of perturbative expansions

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    We propose a systematic approach to the non-equilibrium dynamics of strongly interacting many-body quantum systems, building upon the standard perturbative expansion in the Coulomb interaction. High …

  41. Resonant Thermalization of Periodically Driven Strongly Correlated Electrons

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  42. Renormalization of effective interactions in a negative charge transfer insulator

    Publication
    We compute from first principles the effective interaction parameters appropriate for a low-energy description of the rare-earth nickelate LuNiO3 involving the partially occupied eg states only …