The notion of quantum topological order has been a subject of much
interest recently, in part because it falls outside of the
well-established Landau paradigm whereby states of matter are
classified according to their broken symmetries. Topologically ordered
phases cannot be described by any local order parameter, yet they have
many peculiar properties clearly distinguishing them form the
conventionally disordered phases. For example, in two dimensions, they
may support anyonic excitations - the quasiparticles that are neither
bosons nor fermions. Moreover, anyons with *non-Abelian* braiding
statistics are expected to occur, particularly in the fractional
quantum Hall regime.
Interesting in their own right, such systems may also provide a
platform for topological quantum computation. Interferometric
experiments are likely to play a crucial role in both determining the
non-Abelian nature of these states and in their potential applications
for quantum computing. I will discuss solid state interferometers
designed to detect such non-Abelian quasiparticle statistics. Should
these experiments succeed, such interferometers could also become key
elements in a topological quantum computer.