The "half-quantum" vortices (σ) and quasiparticles (ψ) in a two-dimensional px +i py superconductor obey the Ising-like fusion rules ψ×ψ=1, σ×ψ=σ, and σ×σ= 1+ψ. We explain how the physical fusion of vortex-antivortex pairs allows us to use these rules to read out the information encoded in the topologically protected space of degenerate ground states. We comment on the potential applicability of this fact to quantum computation.
|Original language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 2006|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics