Andrew Strominger

thumb|Andrew Strominger at Harvard Andrew Strominger Andrew Eben Strominger (born July 30, 1955) is an American theoretical physicist, known for his research on quantum gravity and string theory. He has been awarded the Fundamental Physics Prize Physics Frontiers Breakthrough Prize (2012), the Oskar Klein Memorial Lecture Klein Medal (2014), Dirac Prize Dirac Medal (2014), and the Dannie Heineman Prize for Mathematical Physics (2016). Quotes The conditions for spacetime supersymmetry of the heterotic superstring in backgrounds with arbitrary metric, torsion, Yang-Mills and dilaton expectation values are determined using the sigma model approach. The resulting equations are explicitly solved for the torsion and dilaton fields, and the remaining equations cast in a simple form. Previously unnoticed topological obstructions to solving these equations are found. The equations are shown to agree to leading order in perturbation theory with those derived in a field theory approach, provided one considers a more general ansatz than in previous analyses by allowing for a warp factor for the metric. Exact solutions with non-zero torsion are found, indicating a new class of finite sigma models. 10.1016/0550-3213(86)90286-5 Superstrings with torsion 1986 Nuclear Physics B 274 2 253–284 1986NuPhB.274..253S Low-energy effective field theories arising from Calabi–Yau manifold Calabi-Yau string compactifications are generically inconsistent or ill-defined at the classical level because of conifold singularities in the moduli space. It is shown, given a plausible assumption on the degenaracies of black hole states, that for type II theories this inconsistency can be cured by nonperturbative quantum effects: the singularities are resolved by the appearance of massless Ramond-Ramond black holes. 10.1016/0550-3213(95)00287-3 Massless black holes and conifolds in string theory 1995 Nuclear Physics B 451 1–2 96–108 hep-th/9504090 1995NuPhB.451...96S 6035714 It is shown that many of the brane p-branes of type II string theory and d = 11 supergravity can have boundaries on other p-branes. The rules for when this can and cannot occur are derived from charge conservation. For example it is found that membranes in d = 11 supergravity and IIA string theory can have boundaries on fivebranes. The boundary dynamics are governed by the self-dual d = 6 string. A collection of N parallel fivebranes contains 12N(N–1) self-dual strings which become tensionless as the fivebranes approach one another. 10.1016/0370-2693(96)00712-5 Open p-branes 1996 Physics Letters B 383 1 44–47 hep-th/9512059 1996PhLB..383...44S 14615658 Much of theoretical physics over the last century has concerned the reductionist quest to uncover the laws of nature at ever shorter distances. In the last decade it has become increasingly clear, from a variety of investigations, that this long march into the ultraviolet has neglected a surprising wealth of uncharted phenomena in the deep infrared (IR). Far from being a boring place where all is trivial and well-understood, the deep IR in four-dimensional Minkowski space has a rich structure which we are only beginning to understand. Applications range from the IR divergence problem in Quantum electrodynamics QED, 𝒩=4 Yang-Mills and color memory in Quantum chromodynamics QCD in black hole information and a possible fundamental new perspective on space, time and nature. Preface https://books.google.com/books?id=R3OYDwAAQBAJ&pg=PP11 Lectures on the Infrared Structure of Gravity and Gauge Theory 9780691179735 6 March 2018 The uncertainty principle of quantum mechanics says that all spacetime positions are slightly uncertain. ... Nothing is immune from the uncertainty principle. ... Applying the uncertainty principle to Einstein's curved spacetime, we find the rug of physics pulled from under our feet. Andrew Strominger: Solving the Puzzle of Black Holes September 25, 2019 World Science Festival, YouTube https://www.youtube.com/watch?v=pHCfooCqTrw&t=446s (quote at 7:26 of 35:03, partly from slides & partly from voice, in video; part of the Big Ideas Series, supported by the John Templeton Foundation) We have no idea what science will look in, say, twenty or thirty years. ... Every scientist has to bet. Science is not a science — it's an art and a gamble. Mindscape 222 Andrew Strominger on Quantum Gravity and the Real World Sean Carroll, YouTube January 9, 2023 https://www.youtube.com/watch?v=STyVT21vVQg (quote at 1:19:32 of 1:24:27 in video) Why would there be math that had no physical manifestation? Andrew Strominger: Black Holes, Quantum Gravity, and Theoretical Physics Lex Fridman Podcast #359 Lex Fridman, YouTube February 15, 2023 https://www.youtube.com/watch?v=y3cw_9ELpQw (quote from 1:18:41 of 2:19:34) External links Category:Academics from the United States Category:Physicists from the United States Category:1955 births Category:Living people Category:Harvard University alumni Category:University of California, Berkeley alumni Category:Massachusetts Institute of Technology alumni Category:Harvard University faculty