Exotic phases of matter in quantum magnets

Exotic phases of matter in quantum magnets

Exotic phases of matter in quantum magnets

Magic of Kitaev spin liquids

Quantum spin liquids (QSLs) are long-range entangled phases of matter and a natural setting for exploring how quantum correlations generate quantum complexity. Motivated by the emergence of magic, or nonstabilizerness, as a diagnostic of many-body complexity beyond entanglement, we study magic of QSLs by computing the...

Weyl superconductivity from Feshbach resonance in the three-dimensional repulsive Hubbard model

Motivated by the first experimental realization of the antiferromagnetic phase transition in the three-dimensional Fermi-Hubbard model, we present a theoretical study of the model's 3D superconducting phase. By formulating a 3D extension of the Feshbach mechanism, we provide a unified microscopic picture at strong coup...

Ultracold atoms in an optical lattice: One-dimensional phase diagram

Exact phase diagram of the XXZ Heisenberg chain in a staggered magnetic field

We study the phase diagram of the spin-1/2 XXZ Heisenberg chain in a staggered magnetic field. An exact solution is obtained along the phase boundary, where the exchange anisotropy and the staggered-field strength satisfy an exact analytical relation, yielding a highly degenerate manifold of ground states with off-diag...