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Effect of propagator renormalization on the band gap of insulating solids
Sergei Iskakov, Alexander A. Rusakov, Dominika Zgid +1
We present momentum-resolved spectral functions and band gaps from bare and self-consistent second-order perturbation theory for insulating periodic solids. We establish that, for…
Updated Core Libraries of the ALPS Project
Markus Wallerberger, Sergei Iskakov, Alexander Gaenko +13
The open source ALPS (Algorithms and Libraries for Physics Simulations) project provides a collection of physics libraries and applications, with a focus on simulations of lattice…
Efficient implementation of the continuous-time interaction-expansion quantum Monte Carlo method
Hiroshi Shinaoka, Yusuke Nomura, Emanuel Gull
We describe an open-source implementation of the continuous-time interaction-expansion quantum Monte Carlo method for cluster-type impurity models with onsite Coulomb interactions…
Inclusion-Exclusion Principle for Many-Body Diagrammatics
Aviel Boag, Emanuel Gull, Guy Cohen
Recent successes in Monte Carlo methods for simulating fermionic quantum impurity models have been based on diagrammatic resummation techniques, but are restricted by the need to s…
Chebyshev polynomial representation of imaginary time response functions
Emanuel Gull, Sergei Iskakov, Igor Krivenko +2
Problems of finite-temperature quantum statistical mechanics can be formulated in terms of imaginary (Euclidean) -time Green's functions and self-energies. In the context of realis…
Overcomplete compact representation of two-particle Green's functions
Hiroshi Shinaoka, Junya Otsuki, Kristjan Haule +4
Two-particle Green's functions and the vertex functions play a critical role in theoretical frameworks for describing strongly correlated electron systems. However, numerical calcu…