The first part of the talk will be on the theoretical investigation of a
method for the measurement of attosecond pulses based on a cross correlation
between a laser pulse and an attosecond pulse in a noble
gas. The resolution limit of the method lies at about 1/10 - 1/20 of the
optical period of the laser pulse, which is 100-200as for a Ti:sapphire
laser pulse.
In the second part an application of attosecond pulses will be
discussed. We show that attosecond pulses can be used to
temporally resolve the quantum dynamics of electron wavepackets in
a superposition of energetically low lying, atomic bound states (e.g.
|1s> and |2s> of hydrogen).