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Geometric entanglement in integer quantum Hall states with boundaries
Pierre-Gabriel Rozon, Pierre-Alexandre Bolteau, William Witczak-Krempa
Boundaries constitute a rich playground for quantum many-body systems because they can lead to novel degrees of freedom such as protected boundary states in topological phases. Her…
Monopole operators and their symmetries in QED3-Gross-Neveu models
Éric Dupuis, M. B. Paranjape, William Witczak-Krempa
Monopole operators are topological disorder operators in 2+1 dimensional compact gauge field theories appearing notably in quantum magnets with fractionalized excitations. For exam…
Interplay of Coulomb repulsion and spin-orbit coupling in superconducting 3D quadratic band touching Luttinger semimetals
Serguei Tchoumakov, Louis J. Godbout, William Witczak-Krempa
We investigate the superconductivity of 3D Luttinger semimetals, such as YPtBi, where Cooper pairs are constituted of spin-3/2 quasiparticles. Various pairing mechanisms have alrea…
Superconductivity from Coulomb repulsion in three-dimensional quadratic band touching Luttinger semimetals
Serguei Tchoumakov, Louis J. Godbout, William Witczak-Krempa
We study superconductivity driven by screened Coulomb repulsion in three-dimensional Luttinger semimetals with a quadratic band touching and strong spin-orbit coupling. In these se…
Relating bulk to boundary entanglement
Clément Berthiere, William Witczak-Krempa
Quantum many-body systems have a rich structure in the presence of boundaries. We study the groundstates of conformal field theories (CFTs) and Lifshitz field theories in the prese…
Transition from a Dirac spin liquid to an antiferromagnet: Monopoles in a QED3-Gross-Neveu theory
Éric Dupuis, M. B. Paranjape, William Witczak-Krempa
We study the quantum phase transition from a Dirac spin liquid to an antiferromagnet driven by condensing monopoles with spin quantum numbers. We describe the transition in field t…