Faber--Pandharipande Cycles vanish for Shimura curves

Abstract

A result of Green and Griffiths states that for the generic curve $C$ of genus $g \geq 4$ with the canonical divisor $K$, its Faber--Pandharipande 0-cycle $K\times K-(2g-2)K_\Delta$ on $C\times C$ is nontorsion in the Chow group of rational equivalence classes. For Shimura curves, however, we show that their Faber--Pandharipande 0-cycles are rationally equivalent to 0. This is predicted by a conjecture of Beilinson and Bloch.