BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:T. Qureshi DTSTART:20250929T104000Z DTEND:20250929T112500Z DTSTAMP:20260423T024759Z UID:QOART2025/6 DESCRIPTION:Title: Double-slit interference with entangled photons\nby T. Qureshi as pa rt of Quantum Optics and Related Topics 2025\n\n\nAbstract\nA theoretical analysis of a double-slit experiment involving entangled photons is presen ted. It is demonstrated that\, under appropriate conditions\, two entangle d photons with a wavelength of λ can function as a biphoton with a wavele ngth of λ/2. More intriguingly\, we illustrate that even when the two ent angled photons are separated by a polarizing beam splitter\, they can stil l exhibit behavior akin to a biphoton of wavelength λ/2. On the experimen tal front\, we explore two distinct quantum interference phenomena using a double-slit setup: the Hanbury Brown and Twiss (HBT) effect\, where the p hotons traverse different slits\, and NOON-state interference\, in which b oth photons pass through the same slit. We methodically differentiate the two photons based on their orthogonal polarizations and show that both int erference phenomena persist despite their distinguishability at the detect ors. This result goes beyond the conventional understanding of two-photon interference and reveals a new nonlocal HBT effect\, where interference oc curs even in the absence of spatial overlap\, fundamentally tied to the co ncept of entanglement.\n LOCATION:https://researchseminars.org/talk/QOART2025/6/ END:VEVENT END:VCALENDAR