BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Krishnamohan Parattu (IIT Madras) DTSTART:20220830T093000Z DTEND:20220830T103000Z DTSTAMP:20260423T035915Z UID:qucos/2 DESCRIPTION:Title: Qu antum evolution of cosmological perturbations in single and two field infl ationary model\nby Krishnamohan Parattu (IIT Madras) as part of Quantu m Cosmos Seminars\n\n\nAbstract\nWe believe there was a period of exponent ial expansion\, called inflation\, in the evolutionary history of the univ erse. Brought on to solve some puzzles in the standard big bang cosmology\ , inflation also provides a mechanism of origin for the large scale struct ure that we see in the universe as the distribution of galaxies and galaxy clusters\, and also the temperature variations in the cosmic microwave ba ckground. According to this picture\, these structures were seeded by qua ntum fluctuations of the scalar field driving inflation and then stretched out to cosmological scales by the inflationary expansion. Within this par adigm\, one may ask why these fluctuations appear largely classical. On th e other hand\, one may ask if there are any remnant quantum features to pr ove that these fluctuations indeed had a quantum origin. I will discuss th ese issues and present results for some models of current interest in the community for their ability to produce primordial black holes.\n LOCATION:https://researchseminars.org/talk/qucos/2/ END:VEVENT END:VCALENDAR