%0 Journal Article %T Heisenberg algebras and rational double affine Hecke algebras %A P. Shan %A Eric Vasserot %J Mathematics %D 2010 %I arXiv %X In this paper we categorify the Heisenberg action on the Fock space via the category O of cyclotomic rational double affine Hecke algebras. This permits us to relate the filtration by the support on the Grothendieck group of O to a representation theoretic grading defined using the Heisenberg action. This implies a recent conjecture of Etingof. %U http://arxiv.org/abs/1011.6488v2