Coherent control using adaptive learning algorithms - art. no. 063412

We have constructed an automated learning apparatus to control quantum syst ems. By directing intense shaped ultrafast laser pulses into a variety of s amples and using a measurement of the system as a feedback signal, we are a ble to reshape the laser pulses to direct the system into a desired state. The feedback signal is the input to an adaptive learning algorithm. This al gorithm programs a computer-controlled, acousto-optic modulator pulse shape r, The learning algorithm generates new shaped laser pulses based on the su ccess of previous pulses in achieving a predetermined goal.