Scattering and momentum space entanglement
Gianluca Grignani, Gordon W. Semenoff
TL;DR
This paper derives a formula for calculating the entanglement entropy between two momentum space regions caused by scattering of weakly interacting scalar particles, highlighting how interactions entangle different momentum scales.
Contribution
It introduces a new formula for momentum space entanglement entropy resulting from particle scattering, extending understanding of quantum entanglement in quantum field theory.
Findings
Entanglement entropy can be computed for scattering processes.
Weak interactions entangle momentum scales across an infrared cutoff.
The formula applies to scalar particles in quantum field theory.
Abstract
We derive a formula for the entanglement entropy of two regions in momentum space that is generated by the scattering of weakly interacting scalar particles. We discuss an example where weak interactions entangle momentum scales above and below an infrared cutoff.
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