We discuss observables that are sensitive to CP violation in t t(bar)  
production and decay that may be used at the LHC to search for new  
physics. The observables take the form of triple product correlations  
that are induced by top-quark spin correlations. We consider two  
sources of CP violation: a multi-Higgs model with CP violation in the  
neutral Higgs sector; and anomalous couplings of the top-quark. We  
present analytic results that are a suitable starting point for  
numerical simulations for LHC.