Past Events
QG group meeting: Integrability and the quantum inverse scattering method
2018-07-30QG group meeting
Speaker: Blaithin Power
Title: Integrability and the quantum inverse scattering method
Conformal Bootstrap lecture series
2018-07-23Conformal bootstrap lecture series organized by Aryeh Fortinsky
Conformal Bootstrap lecture series
2018-07-20Conformal bootstrap lecture series organized by Aryeh Fortinsky
Conformal Bootstrap lecture series
2018-07-19Conformal bootstrap lecture series organized by Aryeh Fortinsky
Conformal Bootstrap lecture series
2018-07-18Conformal bootstrap lecture series organized by Aryeh Fortinsky
Conformal Bootstrap lecture series
2018-07-17Conformal bootstrap lecture series organized by Aryeh Fortinsky
Conformal Bootstrap lecture series
2018-07-16Conformal bootstrap lecture series organized by Aryeh Fortinsky.
[Lecture] "Massless higher spins and cosmology" by Prof. Ergin Sezgin
2018-07-01We present a Freedman-Robertson-Walker solution of higher spin theory in four dimesions. It is obtained by employing a holomorphic factorization in noncommutative twistor space and gauge functions. We interpret the FRW solution in the context of inflationary cosmology. In interpreting the solution in terms of Fronsdal-type fields in spacetime, a field-dependent higher spin transformation is required, which is implemented at leading order. We also observe that the factorization method provides a convenient framework for setting up a perturbation theory around the exact solutions, and we propose that the nonlinear completion of particle excitations over FRW requires black hole-like states.
[Lecture] "Self-Duality and Chiral Higher Spin Theories" by Dr. Dmitry Ponomarev
2018-07-01In this talk I will review recent results revealing the connection between chiral higher spin theories and self-duality as well as discuss consequences of this connection.
[Lecture] "Soft hair on black hole and cosmological horizons in any dimension" by Prof. Daniel Grumiller
2018-07-01Starting from a generic near horizon expansion in any spacetime dimension greater than two we derive all near horizon symmetries and discover a wealth of novel results: 1. Any non-extremal horizon has an infinite set of near horizon symmetries and associated soft hair excitations. 2. The near horizon symmetries can be represented as generalization of the Bondi-Metzner-Sachs algebra. 3. For horizons that are either flat or non-rotating the near horizon symmetries can be represented as Heisenberg algebras, with one quarter of the inverse of Newton's constant playing the role of Planck's constant. 4. Not only black holes, but also cosmological horizons are equipped with soft hair. We discuss implications of soft hair for horizon thermodynamics and entropy, and comment on open problems and further developments, including possible applications to higher spin theories.