Electromagnetic response of time reversal invariant triplet superconductors

We study the effective action of time reversal invariant triplet superconductors in two and three dimensions and obtain the electromagnetic response. The B-phase of Helium 3 and its two dimensional analog are topologically non-trivial phases. The two dimensional triplet superconductor may be regarded as two copies of a chiral $p_x + i p_y $ superconductor. We discuss signatures of the non-trivial topology in the effective action and in the electromagnetic response.