23 citations · 58 across the 12 of their papers we have counts for
13 papers
First application of the transcorrelated method to noncovalent interactions: The A24 dataset
Johannes Hauskrecht, Stephanie Lambie, Evelin Martine Corvid Christlmaier +3
We present the first application of transcorrelated (TC) coupled-cluster (CC) theory to noncovalent interactions within the xTC approximation. The method is assessed for the A24 da…
Compression of virtual spaces in transcorrelated methods via singular value decomposition: application to the G2 set
Yifan Cheng, Kristoffer Simula, Johannes Hauskrecht +3
We introduce a new singular-value-decomposition-based scheme for constructing small virtual spaces out of large basis sets for transcorrelated (TC) calculations, termed SVD-TC. Thi…
An Additive Reference Correction Scheme for the Transcorrelated Method
Johannes Hauskrecht, Kristoffer Simula, Yifan Cheng +3
We introduce an additive reference correction for the transcorrelated (TC) method and its three-body mean-field approximation (xTC), to improve energy differences computed in small…
A Transcorrelated Wave-Function Framework for Solids: An Application to Bulk and Defected Silicon
Kristoffer Simula, Johannes Hauskrecht, Evelin Martine Corvid Christlmaier +4
Accurate wave-function descriptions of pristine and defected solids remain challenging due to the simultaneous presence of finite-size, basis-set, and correlation errors. While emb…
Modular Construction of Jastrow Factors for the Transcorrelated Method
J. Philip Haupt, Maria-Andreea Filip, Evelin Martine Corvid Christlmaier +3
In this work, we explore the reuse of terms in the Jastrow factor between systems for use in the transcorrelated method, to reduce the number of optimisable parameters for a given…
Deterministic Optimisation of Jastrow Factors
Maria-Andreea Filip, Evelin M. C. Christlmaier, J. Philip Haupt +3
Highly flexible Jastrow factors have found significant use in stochastic electronic structure methods such as variational Monte Carlo (VMC) and diffusion Monte Carlo, as well as in…
Transcorrelated Methods for Multireference Problems
J. Philip Haupt, Evelin M. C. Christlmaier, Pablo López Ríos +3
We apply the transcorrelated method to problems of multireference character. For this, we show that the choice of reference wavefunction during the Jastrow optimisation procedure i…
Transcorrelated Theory with Pseudopotentials
Kristoffer Simula, Evelin Martine Corvid Christlmaier, Maria-Andreea Filip +4
The transcorrelated (TC) method performs a similarity transformation on the electronic Schrödinger equation via Jastrow factorization of the wave function. This has demonstrated si…
Transcorrelated Methods Applied to Second Row Elements
Maria-Andreea Filip, Pablo López Ríos, J. Philip Haupt +3
We explore the applicability of the transcorrelated method to the elements in the second row of the periodic table. We use transcorrelated Hamiltonians in conjunction with full con…
Orbital optimisation in xTC transcorrelated methods
Daniel Kats, Evelin M. C. Christlmaier, Thomas Schraivogel +1
We present a combination of the bi-orthogonal orbital optimisation framework with the recently introduced xTC version of transcorrelation. This allows us to implement non-iterative…
xTC: An efficient treatment of three-body interactions in transcorrelated methods
Evelin Martine Christlmaier, Thomas Schraivogel, Pablo López Ríos +2
An efficient implementation for approximate inclusion of the three-body operator arising in transcorrelated methods via exclusion of explicit three-body components (xTC) is present…
Transcorrelated coupled cluster methods. II. Molecular systems
Thomas Schraivogel, Evelin Martine Christlmaier, Pablo López Ríos +2
We demonstrate the accuracy of ground-state energies of the transcorrelated Hamiltonian, employing sophisticated Jastrow factors obtained from variational Monte Carlo, together wit…
Density Matrix Renormalization Group for Transcorrelated Hamiltonians: Ground and Excited States in \emph{ab initio} Systems
Ke Liao, Huanchen Zhai, Evelin Martine Christlmaier +4
We present the theory of a density matrix renormalization group (DMRG) algorithm which can solve for both the ground and excited states of non-Hermitian transcorrelated Hamiltonian…