Large and ultra-flat optical traps for uniform quantum gases

Area of Science:

• Atomic, Molecular & Optical Physics
• Quantum Many-Body Physics
• Ultracold Atomic Gases

Background:

• Ultracold atomic gases in flat-bottom optical traps are ideal for studying many-body physics.
• Earth-based experiments face limitations in trap size and physical effects due to gravity.
• Microgravity environments offer potential for larger, homogeneous ultracold gases.

Purpose of the Study:

• To develop a method for generating large-scale, uniform ultracold atomic gases.
• To overcome limitations of conventional optical traps for exploring new physics.
• To enable access to previously inaccessible length scales and reduce boundary effects.

Main Methods:

• Utilized two identical, orthogonally aligned acousto-optic deflector setups.
• Generated large, time-averaged optical potentials with significantly increased trapping volumes.
• Validated performance through simulations of quantum gas ground states and dynamical excitations.

Main Results:

• Achieved trapping volumes up to three orders of magnitude larger than conventional setups.
• Generated potentials exhibiting power-law scalings with exponents up to 152.
• Simulations confirmed the system's capability to model quantum gas dynamics.

Conclusions:

• The presented approach enables the creation of large homogeneous ultracold gases in gravity-compensated environments.
• This technique opens new avenues for exploring condensed matter, Efimov physics, and critical phenomena.
• The enhanced control over length scales and boundary effects facilitates advanced many-body physics research.