BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Ioannis Soranidis (Macquarie University) DTSTART:20240625T230000Z DTEND:20240626T010000Z DTSTAMP:20260417T071847Z UID:3cqfs/21 DESCRIPTION:Title: K inematic\, energetic\, and thermodynamic properties of regular black holes \nby Ioannis Soranidis (Macquarie University) as part of Tricontinenta l Quantum Fundamentals Seminar\n\n\nAbstract\nRegular black holes have bec ome a popular alternative to the singular mathematical black holes predict ed by general relativity as they circumvent mathematical pathologies assoc iated with the singularity while preserving crucial black hole features su ch as the trapping of light. Here\, we will analyze how to generate these geometries and study their thermodynamic properties within the framework o f general relativity. Our study reveals that the regularization of the sin gularity\, through the introduction of a minimal length scale\, has a plet hora of implications\, one of which is the absence of the Hawking-Page pha se transition. We extend our study to the dynamical case\, showing that th e internal energy in the first law of black hole thermodynamics is capture d by the Misner-Sharp mass and demonstrating that the linear coefficient o f the Misner-Sharp mass expansion near the outer apparent horizon suffices for a complete thermodynamic description. Additionally\, we analyze the b ehavior of the null energy condition and find that it is violated in the v icinity of the outer horizon and satisfied in the vicinity of the inner ho rizon\, which implies that the trapped spacetime region (as determined fro m the behavior of null geodesic congruences) is effectively separated into an NEC-violating and an NEC-non-violating domain. Moreover\, we show that massive observers and particles can cross the inner and outer horizon on an ingoing geodesic\, and thus entering and exiting the supposedly trapped spacetime region is possible. Lastly\, we comment on the connection betwe en the singularity regularization and the entanglement entropy of massless scalar fields living on the regular black hole background.\n LOCATION:https://researchseminars.org/talk/3cqfs/21/ END:VEVENT END:VCALENDAR