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Totally Destructive Many-Particle Interference.

Christoph Dittel^1,2, Gabriel Dufour^2,3, Mattia Walschaers⁴

¹Institut für Experimentalphysik, Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria.

Physical Review Letters

|June 30, 2018

Summary

This summary is machine-generated.

Many-particle scattering events can be suppressed by exploiting the permutation symmetry of input states. This interference phenomenon is robust against disorder and particle indistinguishability, unifying existing suppression laws.

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Area of Science:

Quantum mechanics
Many-body physics
Scattering theory

Background:

Understanding many-particle interactions is crucial in quantum systems.
Scattering processes are fundamental to probing quantum states.
Existing theories describe specific instances of suppressed transitions.

Purpose of the Study:

To identify general conditions for suppressing many-particle scattering events.
To develop a unified algebraic framework for many-particle interference.
To investigate the robustness of these suppression phenomena.

Main Methods:

Analysis of permutation symmetry in multimode scattering setups.
Formulation of algebraic suppression laws.
Investigation of interference robustness under disorder and imperfect indistinguishability.

Main Results:

Permutation symmetry dictates scattering unitaries with suppressed many-particle transitions.
Algebraic laws precisely identify these suppressed events.
Many-particle interference is robust against weak disorder and imperfect particle indistinguishability.

Conclusions:

A general framework unifies previously described suppression laws.
The findings offer new insights into controlling quantum interference.
The robustness of interference opens possibilities for practical applications.