Experimental Demonstration of Shaken-Lattice Interferometry

Area of Science:

• Quantum optics
• Atomic physics
• Interferometry

Background:

• Atom interferometers are powerful tools for precision measurements.
• Optical lattices provide a versatile platform for manipulating atomic states.

Purpose of the Study:

• To experimentally demonstrate a shaken-lattice interferometer.
• To investigate the sensitivity scaling of this novel interferometry technique.

Main Methods:

• Atoms were trapped in a red-detuned optical lattice in the ground Bloch state.
• A closed-loop optimization protocol using the dcrab algorithm was employed for phase modulation.
• The optical lattice was shaken to transform atomic momentum states, creating an atom beam splitter.

Main Results:

• Five interferometers with varying interrogation times (T_{I}) were constructed.
• The sensitivity was experimentally shown to scale quadratically with interrogation time (T_{I}^{2}).
• The ability to measure signal sign and optimize the interferometer in the presence of bias was demonstrated.

Conclusions:

• The shaken-lattice interferometer is a viable and sensitive quantum measurement tool.
• The demonstrated sensitivity scaling aligns with theoretical predictions.
• This technique offers potential for enhanced precision in atomic measurements.