Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2020

Two-boson quantum interference in time

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Significance We uncover an unsuspected quantum interference mechanism, which originates from the indistinguishability of identical bosons in time. Specifically, we build on the Hong–Ou–Mandel effect, namely the “bunching” of identical bosons at the output of a half-transparent beam splitter resulting from the symmetry of the wave function. We establish that this effect turns, under partial time reversal, into an interference effect in a quantum amplifier that we ascribe to time-like indistinguishability (bosons from the past and future cannot be distinguished). This hitherto unknown effect is a genuine manifestation of quantum physics and may be observed whenever two identical bosons participate in Bogoliubov transformations, which play a role in many facets of physics.

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hal-05022349 , version 1 (06-04-2025)

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Nicolas J Cerf, Michael G Jabbour. Two-boson quantum interference in time. Proceedings of the National Academy of Sciences of the United States of America, 2020, 117 (52), pp.33107-33116. ⟨10.1073/pnas.2010827117⟩. ⟨hal-05022349⟩
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