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Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

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Published on: August 17, 2017

Forces on three-level atoms including coherent population trapping.

M G Prentiss, N P Bigelow, M S Shahriar

|September 29, 2009

Summary

We calculated the force on a three-level atom interacting with Raman light fields. Ground-state coherences significantly influence the atomic force, which can be scaled to large magnitudes.

Area of Science:

Atomic physics
Quantum optics

Background:

Understanding light-atom interactions is crucial for quantum technologies.
The force exerted by light fields on atoms is a fundamental phenomenon.

Purpose of the Study:

To calculate the force on a stationary three-level atom excited by a Raman light field.
To investigate the role of ground-state coherences in atomic force.
To analyze the spatial variation and magnitude of the calculated force.

Main Methods:

Theoretical calculation of the force on a three-level atom.
Inclusion of arbitrary combinations of standing- and traveling-wave fields.
Explicit consideration of ground-state coherences.

Main Results:

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The force on the atom is significantly influenced by ground-state coherences.
The force exhibits spatial variations on length scales shorter and longer than the optical wavelength.
The magnitude of the force can be arbitrarily large.

Conclusions:

Ground-state coherences are essential for accurately describing light-induced forces on atoms.
The complex nature of Raman light fields leads to versatile force characteristics.
This work provides insights into controlling atomic motion using tailored light fields.