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quant-ph2026
Photon localization: Local measurements, localized states, and causality
Jan Gulla, Johannes Skaar
We review what it means for a relativistic particle to be localized and argue that the most useful approach is through local measurement. This perspective ties localization directl…
quant-ph2026
Strictly Localized Mixed States
Sigurd Sørlie Rustad, Jan Gulla, Johannes Skaar
We study strictly localized mixed states in quantum field theory: states that are indistinguishable from vacuum outside some spacetime region. Such states are generated from the va…