Long-lived Feshbach molecules in a three-dimensional optical lattice

Area of Science:

• Ultracold atom physics
• Quantum chemistry
• Condensed matter physics

Background:

• Feshbach molecules are crucial for studying quantum phenomena.
• Previous methods suffered from short lifetimes and low conversion efficiency due to inelastic decay.

Purpose of the Study:

• To create and trap pure Feshbach molecules in a 3D optical lattice.
• To improve molecule lifetimes and conversion efficiency.
• To enable precise control over molecular states.

Main Methods:

• Creation and trapping of Feshbach molecules in a 3D optical lattice.
• Development of an advanced purification scheme to remove residual atoms.
• Utilizing lattice confinement to shield molecules from collisions.

Main Results:

• Achieved long molecular lifetimes up to 700 ms.
• Demonstrated near-unit efficiency for converting atom pairs into molecules.
• Obtained a pure sample with single molecules in the vibrational ground state per lattice site.

Conclusions:

• The 3D optical lattice effectively shields Feshbach molecules, preventing inelastic decay.
• This technique provides a robust platform for studying ultracold molecules.
• Enables future applications in quantum simulation and precision measurements.