![]() ![]() ![]() I will end with some open questions and future directions. I will finally show two ways to use this information to conclude that the Hilbert space spanned by these states is e^S dimensional, where S is the Bekenstein-Hawking entropy of the black hole. ![]() I will then show that the gravitational path integral is able to detect non-vanishing overlaps between these states via exponentially suppressed, yet universal, wormhole contributions. In this talk, I will start by constructing an infinite family of semiclassical microstates with distinct geometric interiors in the gravitational effective field theory, which naively overcount the entropy of the black hole. Wednesday, February 15 Martin Sasieta, Brandeis University Title: Microscopic origin of the entropy of black holes in general relativity Abstract: In many situations, the local description of the interior of the black hole is in tension with its universal entropy, given by the Bekenstein-Hawking formula. In this talk I will begin with a general overview of the problem of finding vacua in string theory, explain the physical mechanism at work in our solutions, and comment on the prospects for de Sitter solutions along similar lines. Wednesday, February 8 Liam McAllister, Cornell Title: Small Cosmological Constants in String Theory Abstract: Why is the vacuum energy in our Universe exponentially small in natural units? Motivated by this difficult problem, we ask a related but cleaner question: do there exist controlled anti-de Sitter solutions of string theory in which the internal space is small but the four-dimensional spacetime is exponentially large compared to the string length? We give an affirmative answer, by explicit construction, in Calabi-Yau compactifications of type IIB string theory. Organizers: Daniel Harlow, Manki Kim, Hotat Lam, Washington Taylor Held every Wednesday, 3:00-4:00pm EST. Pappalardo Fellowships show submenu for “Pappalardo Fellowships”.Astrophysics Observation, Instrumentation, and Experiment.Research Areas show submenu for “Research Areas”.Mentoring Programs Information show submenu for “Mentoring Programs Information”.PhD in Physics, Statistics, and Data Science.For Graduate Students show submenu for “For Graduate Students”.For Undergraduate Students show submenu for “For Undergraduate Students”.Academic Programs show submenu for “Academic Programs”.Administration show submenu for “Administration”. ![]()
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