The theory of entanglement provides a fundamentally new language for describing
interactions and correlations in many-body systems. Its vocabulary consists of qubits and …

We obtain multiple exact results on the entanglement of the exact excited states of
nonintegrable models we introduced in Phys. Rev. B 98, 235155 (2018) 10.1103/PhysRevB …

Motivated by experimental studies that have found signatures of a quantum spin liquid
phase in organic crystals whose structure is well described by the two-dimensional …

We discuss a method of numerically identifying exact energy eigenstates for a finite system,
whose form can then be obtained analytically. We demonstrate our method by identifying …

The antiferromagnetic spin-1/2 Heisenberg model on a kagome lattice is one of the most
paradigmatic models in the context of spin liquids, yet the precise nature of its ground state …

We theoretically analyze recent experiments [Semeghini et al., Science 374, 1242 (2021)
SCIEAS 0036-8075 10.1126/science. abi8794] demonstrating the onset of a topological spin …

In these lecture notes we give a technical overview of tangent-space methods for matrix
product states in the thermodynamic limit. We introduce the manifold of uniform matrix …

We study the spin liquid candidate of the spin-1/2 J 1-J 2 Heisenberg antiferromagnet on the
triangular lattice by means of density matrix renormalization group (DMRG) simulations. By …

Effectively compressing and optimizing tensor networks requires reliable methods for fixing
the latent degrees of freedom of the tensors, known as the gauge. Here we introduce a new …

Motivated by recent experiments on α-RuCl 3, we investigate a possible quantum spin liquid
ground state of the honeycomb-lattice spin model with bond-dependent interactions. We …