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Researchers at Tampere University have experimentally demonstrated that studies in quantum photonics can be scaled up to encompass a broader spectrum of quantum mechanics than previously believed. The experiment made use of parity-time (PT) symmetry, a relatively new frame of reference that extends the traditional Hermitian quantum mechanics framework to increase the number of systems that can be described using quantum theory. The researchers demonstrated two-photon quantum interference in a PT-symmetric system.
The experimental setup was based on the Hong-Ou-Mandel (HOM) effect. Two photons were combined inside a beam splitter. To monitor their quantum interference, photodetectors were placed at each of the two output ports of the…READ MORE