Noise cancellation system for shaking optical lattice by controlling optical path

Area of Science:

• Atomic, Molecular, and Optical Physics
• Quantum Control
• Experimental Physics

Background:

• Optical lattices are crucial for manipulating atoms, but are sensitive to vibrations.
• Controlling the phase of optical lattices is essential for engineering atomic states.
• Unwanted phase fluctuations can arise from environmental factors like mirror vibrations.

Purpose of the Study:

• To develop a servo system for precise optical lattice phase control.
• To distinguish and attenuate unwanted phase variations while preserving intended lattice shaking.
• To enable engineering of atomic momentum states in shaken optical lattices.

Main Methods:

• Utilizing the interference signal of two beams to detect and control optical lattice phase.
• Implementing a servo system to actively adjust the relative phase of the beams.
• Measuring the servo's accuracy, bandwidth, and attenuation capabilities.

Main Results:

• The servo system accurately follows the intended shaking function with 99% fidelity.
• Achieved a bandwidth of 1.2 kHz for attenuating unwanted shaking by -13 dB.
• Demonstrated the ability to control the relative phase between beams effectively.

Conclusions:

• The developed servo system offers a robust method for stabilizing optical lattices against vibrations.
• This technique allows for precise engineering of atomic momentum states in shaken lattices.
• The phase control method is broadly applicable to various time-varying experimental setups.