Twisted Conformal Symmetry in Noncommutative Two-Dimensional Quantum   Field Theory
  By twisting the commutation relations between creation and annihilation operators, we show that quantum conformal invariance can be implemented in the 2-d Moyal plane. This is an explicit realization of an infinite dimensional symmetry as a quantum algebra. 
Fedele Lizzi, Sachindeo Vaidya, Patrizia Vitale