BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:P. K. Panigrahi DTSTART:20240904T060000Z DTEND:20240904T070000Z DTSTAMP:20260423T005652Z UID:QOART/13 DESCRIPTION:Title: M eso and Macroscopic Quantum States of Light\nby P. K. Panigrahi as par t of Quantum Optics and Related Topics\n\n\nAbstract\nWe investigate the n ature of correlated photons from three dipole-coupled two-level atomic sys tems and find the clear signatures of the entangled matter states on the n ature of the emitted photons. The presence of two phases\, as predicted by Dicke a long time back\, is evident in the far-field spectrum. The phase transition between these two phases and the behaviour of concurrence\, dis cord and monogamy in both these phases are explicated. The effect of the a tomic configuration is pointed out in the optical domain. We then investig ate another macroscopic state of condensed photons\, where photonic superf luidity and supersolidity are pointed out with exact solutions of the rele vant mean field equations: nonlinear Schrodinger equation with a source. T he earlier experimental observation of the superfluid phase opens the way for the possible realization of photonic supersolidity. We further highlig ht the deep connection between entanglement\, coherence\, and path predict ability in the much-studied multi- slit experiments.\n\nRef:\n\n(1) M. K. Parit et al.\, “Correlated photons of desired characteristics from a dip ole coupled three-atom system”\, OSA Continuum 2 (8)\, pp. 2293-2307 (20 19).\n\n(2) Dynamical phase transition of photon condensate in an optical cavity Neeraj\, MK Parit\, VM Vyas\, PK Panigrahi\,Journal of the Optical Society of America B 38 (2)\, 476-481\n\n(3) A scheme to observe universal breathing mode and Berezinskii–Kosterlitz–Thouless phase transition i n a two-dimensional photon gas\, VM Vyas\, PK Panigrahi\, J Banerji\, Phys ics Letters A 378 (20)\, 1434-1437\n\n(4) Coherence\, path predictability\ , and concurrence: A triality AK Roy\, N Pathania\, NK Chandra\, PK Panigr ahi\, T Qureshi\, Physical Review A 10\,(3)\, 032209\n LOCATION:https://researchseminars.org/talk/QOART/13/ END:VEVENT END:VCALENDAR