For decades, frustrated quantum magnets have been a seed for scientific progress and
innovation in condensed matter. As much as the numerical tools for low-dimensional …

A major challenge in the field of correlated electrons is the computation of dynamical
correlation functions. For comparisons with experiment, one is interested in their real …

The pseudofermion representation for S= 1/2 quantum spins introduces unphysical states in
the Hilbert space, which can be projected out using the Popov-Fedotov trick. However, state …

By merging algorithmic Matsubara integration with discrete pole representations we present
a procedure to generate fully analytic closed form results for impurity problems at fixed …

We investigate the ground state and critical temperature (T c) phase diagrams of the
classical and quantum S= 1 2 pyrochlore lattice with nearest-neighbor Heisenberg and …

We use our recently developed functional renormalization group (FRG) approach for
quantum spin systems to investigate the phase diagram of the frustrated J 1 J 2 J 3 quantum …

The pseudo-fermion functional renormalization group is generalized to treat spin
Hamiltonians with finite magnetic fields, enabling its application to arbitrary spin lattice …

Motivated by recent experiments on Ce 2 Zr 2 O 7 that reveal a dynamic, liquidlike ground
state, we study the nearest-neighbor XYZ Hamiltonian of dipolar-octupolar pyrochlore …

We present a classification of bilinear Majorana representations for spin-S operators, based
on the real irreducible matrix representations of SU (2). We identify two types of such …

We investigate dimerized quantum spin systems using the spin functional renormalization
group approach proposed by Krieg and Kopietz [Phys. Rev. B 99, 060403 (R)(2019) 2469 …