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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

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Inelastic electron scattering induced quantum coherence in molecular dynamics.

Akshay Kumar¹, Suvasis Swain^1,2, Vaibhav S Prabhudesai³

¹Tata Institute of Fundamental Research, Colaba Mumbai, 400005, India.

Nature Communications

|May 13, 2023

Summary

This summary is machine-generated.

We discovered that non-resonant electron scattering can induce quantum coherence in molecular dynamics, specifically in hydrogen molecule ion-pair formation. This finding has broad implications for understanding particle collisions and electron-induced chemistry.

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Area of Science:

Quantum mechanics
Molecular dynamics
Atomic and molecular physics

Background:

Quantum coherence is crucial for quantum computing and chemical control.
Symmetry breaking in molecular photodissociation is a known manifestation of coherence.
Previous studies on electron-induced coherence were limited to resonant processes.

Purpose of the Study:

To investigate non-resonant inelastic electron scattering as a general mechanism for inducing quantum coherence.
To explore the role of coherence in the ion-pair formation of hydrogen molecules.

Main Methods:

Theoretical investigation of electron impact excitation of H2.
Analysis of ion-pair formation (H+ + H-) dynamics.
Examination of angular momentum transfer during electron collision.

Main Results:

Demonstrated non-resonant inelastic electron scattering induces quantum coherence.
Observed forward-backward asymmetry in H2 ion-pair formation, indicating coherence.
Identified simultaneous transfer of multiple angular momentum quanta as the source of coherence.

Conclusions:

Non-resonant electron scattering provides a general pathway to induce quantum coherence in molecular dynamics.
The observed coherence in H2 ion-pair formation is a generic effect.
This phenomenon may play a significant role in various particle collision processes, including electron-induced chemistry.