A
Armin Comanac
Researcher at Columbia University
Publications - 3
Citations - 859
Armin Comanac is an academic researcher from Columbia University. The author has contributed to research in topics: Quantum Monte Carlo & Hubbard model. The author has an hindex of 3, co-authored 3 publications receiving 742 citations.
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Continuous-Time Solver for Quantum Impurity Models
Philipp Werner,Armin Comanac,Luca de' Medici,Luca de' Medici,Matthias Troyer,Andrew J. Millis +5 more
TL;DR: A new continuous-time solver for quantum impurity models such as those relevant to dynamical mean field theory, based on a stochastic sampling of a perturbation expansion in the impurity-bath hybridization parameter is presented, which allows very efficient simulations even at low temperatures and for strong interactions.
Journal ArticleDOI
Optical conductivity and the correlation strength of high-temperature copper-oxide superconductors
TL;DR: In this paper, a comparison of new theoretical calculations and published optical conductivity measurements is presented, which indicates that the correlation strength in the cuprates is not as strong as previously believed, in particular that the materials are not properly regarded as Mott insulators.
Journal ArticleDOI
Benchmarkings for a semiclassical impurity solver for dynamical-mean-field theory: Self-energies and magnetic transitions of the single-orbital Hubbard model
TL;DR: In this paper, an exact numerical integral over the zero-Matsubara-frequency component of the spin part of a continuous Hubbard-Stratonovich field, along with a spin-field-dependent steepest descent treatment of the charge part is presented for solving the quantum impurity problems arising in the dynamical mean field approach to correlated-electron models.