Pseudo-fermion functional renormalization group for spin models
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 …
innovation in condensed matter. As much as the numerical tools for low-dimensional …
Pinwheel valence bond crystal ground state of the spin- Heisenberg antiferromagnet on the shuriken lattice
We investigate the nature of the ground state of the spin-1 2 Heisenberg antiferromagnet on
the shuriken lattice by complementary state-of-the-art numerical techniques, such as …
the shuriken lattice by complementary state-of-the-art numerical techniques, such as …
Candidate quantum disordered intermediate phase in the Heisenberg antiferromagnet on the maple-leaf lattice
Quantum antiferromagnets on geometrically frustrated lattices have long attracted interest for
the formation of quantum disordered states and the possible emergence of quantum spin …
the formation of quantum disordered states and the possible emergence of quantum spin …
Quantum effects on unconventional pinch point singularities
N Niggemann, Y Iqbal, J Reuther - Physical Review Letters, 2023 - APS
Fracton phases are a particularly exotic type of quantum spin liquids where the elementary
quasiparticles are intrinsically immobile. These phases may be described by unconventional …
quasiparticles are intrinsically immobile. These phases may be described by unconventional …
Multiloop functional renormalization group approach to quantum spin systems
Renormalization group methods are well-established tools for the (numerical) investigation
of the low-energy properties of correlated quantum many-body systems, allowing us to …
of the low-energy properties of correlated quantum many-body systems, allowing us to …
Rise and fall of plaquette order in the Shastry-Sutherland magnet revealed by pseudofermion functional renormalization group
A Keleş, E Zhao - Physical Review B, 2022 - APS
The Shastry-Sutherland (SS) model as a canonical example of frustrated magnetism has
been extensively studied. The conventional wisdom has been that the transition from the …
been extensively studied. The conventional wisdom has been that the transition from the …
Dimerization tendencies of the pyrochlore Heisenberg antiferromagnet: A functional renormalization group perspective
We investigate the ground-state properties of the spin-1/2 pyrochlore Heisenberg
antiferromagnet using pseudofermion functional renormalization group techniques. The first …
antiferromagnet using pseudofermion functional renormalization group techniques. The first …
Quantum paramagnetism in the decorated square-kagome antiferromagnet
The square-kagome lattice Heisenberg antiferromagnet is a highly frustrated Hamiltonian
whose material realizations have been scarce. We theoretically investigate the recently …
whose material realizations have been scarce. We theoretically investigate the recently …
Adaptive variational quantum minimally entangled typical thermal states for finite temperature simulations
Scalable quantum algorithms for the simulation of quantum many-body systems in thermal
equilibrium are important for predicting properties of quantum matter at finite temperatures …
equilibrium are important for predicting properties of quantum matter at finite temperatures …
Taming pseudofermion functional renormalization for quantum spins: Finite temperatures and the Popov-Fedotov trick
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 …
the Hilbert space, which can be projected out using the Popov-Fedotov trick. However, state …