Generation of heralded vector-polarized single photons in remotely controlled topological classes

• URL: http://arxiv.org/abs/2402.11046v1
• Date: Fri, 16 Feb 2024 19:44:44 GMT
• Title: Generation of heralded vector-polarized single photons in remotely controlled topological classes
• Authors: Samuel Corona-Aquino, Zeferino Ibarra-Borja, Omar Calder\'on-Losada, Bruno Piccirillo, Ver\'onica Vicu\~na-Hern\'andez, Tonatiuh Moctezuma-Quistian, H\'ector Cruz-Ram\'irez, Dorilian Lopez-Mago, Alfred B. U'Ren
• Abstract summary: A laser beam is shaped by a voltage-controlled spin-to-orbital angular momentum converter q-plate device. Such a beam is then used as pump in a spontaneous parametric downconversion (SPDC) photon-pair source. We demonstrate the full pump to heralded single photon transfer of the intensity/phase distributions, as well as of the vector polarization structure.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: We demonstrate an experimental protocol for the preparation and control of heralded single photons in inhomogeneously polarized states, such as Vector Vortex and Full Poincar\'e beam states. A laser beam is shaped by a voltage-controlled spin-to-orbital angular momentum converter q-plate device which eliminates the need for an interferometer for the robust preparation of high-quality inhomogeneously polarized beams. Such a beam is then used as pump in a spontaneous parametric downconversion (SPDC) photon-pair source. We demonstrate the full pump to heralded single photon transfer of the intensity/phase distributions, as well as of the vector polarization structure. Additionally, we show that by controlling the polarization to which the heralding idler photon is projected before detection, we can toggle between the direct and basis-switched pump-single photon transfer. We show that this non-local control of the heralded single photon pertains also to the topological class of the resulting heralded single photon. We believe that our work will lead to new opportunities in photons-based quantum information processing science.

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