We prove a global limiting absorption principle on the entire real line for
free, massless Dirac operators H0=α⋅(−i∇) for all space
dimensions n∈N, n≥2. This is a new result for all
dimensions other than three, in particular, it applies to the two-dimensional
case which is known to be of some relevance in applications to graphene.
We also prove an essential self-adjointness result for first-order
matrix-valued differential operators with Lipschitz coefficients.Comment: 22 page