  Hadron spectra and elliptic flow in relativistic heavy-ion collisions are
studied in event-by-event (3+1)D ideal hydrodynamic simulations with
fluctuating initial conditions given by the AMPT Monte Carlo model. Both the
coherent soft gluon production from wounded nucleons and incoherent mini-jet
production in semi-hard parton scatterings are considered. These partons take
part in parton cascade and are assumed to be locally thermalized. They provide
the fluctuating initial conditions for hydrodynamic simulations with a Gaussian
smearing. Effects of both transverse and longitudinal fluctuations are studied.
The initial fluctuations along rapidity direction lead to expanding hot spots
in longitudinal direction, which will reduce elliptic flow and the yield of
particles at high transverse momentum. The intrinsic correlation introduced in
the fluctuating initial conditions is also found to influence the di-hadron
correlation of the final hadrons.
