Answers are grounded in this paper and cite their sources.
Electrons in a so-called topological insulator circulate around the material’s boundary without ever straying into the bulk. Uncharged photons can be induced to carry out similar behavior.
No takes yet. Share an insight, caveat, or question.
Hafezi et al. (2014) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: