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Quantum Algorithms

A truncated photon

arXiv

Authors: Isak Cecil Onsager Rukan, Jan Gulla, Johannes Skaar

Year

2025

Paper ID

50776

Status

Preprint

Abstract Read

~2 min

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Abstract

An elementary particle such as a photon cannot be cut in two pieces. Still it must be possible to truncate a photon with an optical shutter. The result is not another photon or a mix of a photon and a vacuum. Instead it is a superposition and mix of photon numbers up to infinity. This state is rather complicated, but nevertheless locally equivalent to a single photon or vacuum in disjoint regions. Finally we demonstrate how the truncated photon may be illuminating and useful for the understanding of locality and equivalence in quantum field theory.

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It adds a 2025 reference point for readers tracking recent quantum research.
An elementary particle such as a photon cannot be cut in two pieces.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2510.21636 [2] arXiv https://arxiv.org/abs/2510.21636 [3] Publisher https://arxiv.org/abs/2510.21636

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External citation index: OpenAlex citation signal • updated 2026-06-08 16:24:33

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