BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:A. B. Fedotov DTSTART:20240906T074000Z DTEND:20240906T084000Z DTSTAMP:20260423T024547Z UID:QOART/24 DESCRIPTION:Title: F our-wave mixing in photonic crystal fibers for generation of tailored quan tum states of light\nby A. B. Fedotov as part of Quantum Optics and Re lated Topics\n\n\nAbstract\nWe demonstrate a versatile fiber-optic platfor m for the generation of tailored quantum states of light\, designed to enh ance the performance of quantum sensing and imaging. The developed platfor m is based on optical fibers of special design\, including photonic-crysta l fibers (PCFs).\n\nThe design of optical fibers is optimized to provide a n ultrahigh-contrast generation of entangled photon pairs confined to enta nglement volumes many orders of magnitude smaller than the entanglement vo lumes attainable through spontaneous parametric down-conversion. Four-wave mixing (FWM) with cross-polarized pump and cross-polarized sidebands enab les efficient generation of entangled photon pairs. Generation of cross-po larized photon pairs is achieved by coupling the laser pump into orthogona l polarization modes of a highly birefringent\, highly nonlinear\, anomalo usly dispersive PCF. The contrast of photon pairs against the Raman noise is enhanced by setting the pump wavelength to lie deeply within the anomal ous dispersion region of the fiber. Broadband quantum states of light gene rated via vectorial FWM are tailored\, by varying the pump wavelength and polarization geometry\, from a high-purity\, low-dimensional entangled sta te to a high-entropy entangled state in a space of a very high dimensional ity.\n LOCATION:https://researchseminars.org/talk/QOART/24/ END:VEVENT END:VCALENDAR