Effect of atom diffusion on the efficiency of Bragg diffraction in atom interferometers.

Area of Science:

• Atomic, Molecular, and Optical Physics
• Quantum Optics
• Metrology

Background:

• Bragg diffraction is crucial for atom interferometry, acting as mirrors and beam splitters.
• Transition efficiency directly affects fringe contrast and measurement sensitivity.
• Atomic source properties, pulse shapes, and timing influence diffraction efficiency.

Purpose of the Study:

• To investigate the impact of atomic source diffusion and velocity width on Bragg diffraction efficiency.
• To quantify the effects of these atomic properties on Bragg mirror and beam splitter performance.
• To provide insights for optimizing Bragg pulses in atom interferometry.

Main Methods:

• Numerical simulation of Bragg diffraction efficiency.
• Experimental measurement of transfer efficiency for Bragg mirrors and beam splitters.
• Quantification of atomic diffusion and velocity width effects.

Main Results:

• Bragg diffraction efficiency is significantly affected by atomic source diffusion and velocity width.
• Numerical simulations and experimental measurements show good agreement.
• Efficiency variations were precisely computed as a function of atomic source parameters.

Conclusions:

• Atomic source characteristics are key determinants of Bragg diffraction efficiency.
• The study provides a methodology to optimize Bragg pulses for specific atomic sources.
• Findings will aid in designing advanced atom interferometry experiments with large momentum transfer beam splitters.