5 papers
Bose-Einstein condensation and superfluidity on a fuzzy sphere
Vira Shyta, Flavio S. Nogueira, Ashley M. Cook
According to Hohenberg's theorem, Bose-Einstein condensation (BEC) in two dimensions is impossible for any temperature . By contrast, superfluidity does occur in two dimension…
Transition between one- and two-dimensional topology in a Chern insulator of finite width
Frode Balling-Ansø, Adipta Pal, Ashley M. Cook +1
Topology in quantum systems is typically considered in infinite crystals in one, two, or higher integer dimensions. Here, we show that one can continuously transform a system betwe…
Microscopic field theories of the quantum skyrmion Hall effect
Vinay Patil, Archi Banerjee, Ashley M. Cook
We construct effective field theories of the quantum skyrmion Hall effect from matrix Chern-Simons theory for electrons, corresponding to matrix dimension . We first conside…
Multiplicative Chern insulator
Archi Banerjee, Ashley M. Cook
We study multiplicative Chern insulators (MCIs) as canonical examples of multiplicative topological phases of matter. Constructing the MCI Bloch Hamiltonian as a symmetry-protected…
Effective field theory of the quantum skyrmion Hall effect
Vinay Patil, Rafael Flores-Calderón, Ashley M. Cook
Motivated by phenomenology of myriad recently-identified topologically non-trivial phases of matter, we introduce effective field theories (EFTs) for the quantum skyrmion Hall effe…