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Related Experiment Video

Updated: Dec 26, 2025

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

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Published on: August 6, 2018

Direct Measurements of Collisional Dynamics in Cold Atom Triads.

L A Reynolds^1,2, E Schwartz^1,2, U Ebling^1,3

¹The Dodd-Walls Centre for Photonic and Quantum Technologies, New Zealand.

Physical Review Letters

|March 7, 2020

Summary

Researchers assembled atom triads using optical tweezers, observing atom loss at the single event level. They found a significant suppression of three-body loss, challenging current theories and suggesting local anticorrelations in few-body systems.

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Area of Science:

Atomic physics
Quantum mechanics
Few-body systems

Background:

Optical tweezers enable precise manipulation of atoms.
Understanding few-body systems is crucial for quantum science.
Distinguishing particle processes in many-atom experiments is challenging.

Purpose of the Study:

To achieve the first bottom-up assembly of atom triads.
To directly observe atom loss through inelastic collisions at the single-event level.
To investigate three-body loss mechanisms in trapped atomic systems.

Main Methods:

Utilized optical tweezers for atom trapping and manipulation.
Developed a method to observe single-event atom loss.
Assembled atom triads through a bottom-up approach.

Main Results:

Successfully assembled atom triads.
Directly observed atom loss due to inelastic collisions.
Measured a strong suppression of three-body loss.
Observed phenomena not fully explained by current three-body theory.

Conclusions:

The suppression of three-body loss may indicate local anticorrelations.
Attractive short-range interactions and low-dimensional confinement play a role.
The methodology provides a new pathway for studying experimental few-body dynamics.