Pancharatnam revisited

Erik Sj\"oqvist

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classification 🪐 quant-ph

keywords pancharatnamphaserelativestatesconcerningdelineateddescribeddiscussed

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Some recent ideas concerning Pancharatnam's prescription of relative phase between quantal states are delineated. Generalisations to mixed states and entangled two-photon states are discussed. An experimental procedure to test the geometric phase as a Pancharatnam relative phase is described. We further put forward a spatial split-beam dual to Pancharatnam's relative phase.

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Pancharatnam revisited

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