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He-McKellar-Wilkens topological phase in atom interferometry.

S Lepoutre¹, A Gauguet, G Trénec

¹Laboratoire Collisions Agrégats Réactivité-IRSAMC, Université de Toulouse-UPS and CNRS UMR, France.

Physical Review Letters

|September 26, 2012

Summary

This summary is machine-generated.

This study experimentally tested the He-McKellar-Wilkens phase, a small topological phase appearing when electric dipoles move through magnetic fields. The measured phase showed a 31% deviation from theory, indicating potential systematic errors.

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Area of Science:

Quantum mechanics
Atomic physics
Condensed matter physics

Background:

The He-McKellar-Wilkens phase is a predicted topological phase related to the Aharonov-Casher effect via electric-magnetic duality.
This phase arises from the interaction of an electric dipole with a magnetic field.

Purpose of the Study:

To experimentally verify the existence and measure the magnitude of the He-McKellar-Wilkens phase.
To compare experimental results with theoretical predictions.

Main Methods:

Utilized a highly sensitive atom interferometer with spatially separated arms.
Employed symmetry reversals, including electric and magnetic field direction changes.
Measured a maximum phase shift of 27 mrad.

Main Results:

The experiment successfully detected the He-McKellar-Wilkens phase.
The measured phase value deviated by 31% from the theoretically predicted value.
The deviation suggests the presence of uncontrolled systematic errors.

Conclusions:

The experimental test provides evidence for the He-McKellar-Wilkens phase.
Further investigation is needed to identify and mitigate systematic errors for more precise measurements.