Short coherent control pulse with small random errors in its direction

Two-pulse atomic coherent control

Two-pulse atomic coherent control (2PACC) spectroscopy is presented. The idea is demonstrated by simulating a source consisting of a two-pulse atom laser impinging on a surface covered with a co-adsorbed atom. The controlled outcome is an Eley–Rideal chemical reaction where the controls are the time delay and relative phase between the twopulses. The two atom laser pulses interfere with each ot...

Coherent Control of Ultracold Collisions with Chirped Light: Direction Matters

We demonstrate the ability to coherently control ultracold atomic Rb collisions using frequencychirped light on the nanosecond time scale. For certain center frequencies of the chirp, the rate of inelastic trap-loss collisions induced by negatively chirped light is dramatically suppressed compared to the case of a positive chirp. We attribute this to a fundamental asymmetry in the system: an ex...

Coherent Control of Multiphoton Transitions with Femtosecond pulse shaping

We explore the effects of ultrafast shaped pulses for two-level systems that do not have a single photon resonance by developing a multiphoton densitymatrix approach. We take advantage of the fact that the dynamics of the intermediate virtual states are absent within our laser pulse timescales. Under these conditions, the multiphoton results are similar to the single photon and that it is possi...

Filamentation with Ultra Short Pulse in Air and its applications

We report here the recent progresses in both theoretical and experimental studies on the propagation of ultra short optical high-energy pulse through the atmosphere. The applications based on promising properties of long filamentation in air have been presented. These include white light LIDAR and laser lightning control.

Laser Pulse Shaping and Coherent Control of Molecules