Higher-Spin Flat Space Cosmologies with Soft Hair

Mar 7, 2017
22 pages
Published in:
  • JHEP 05 (2017) 031
  • Published: May 8, 2017
e-Print:
DOI:
Report number:
  • TUW--17--01

Citations per year

201720192021202320250246810
Abstract: (Springer)
We present and discuss near horizon boundary conditions for flat space higher-spin gravity in three dimensions. As in related work our boundary conditions ensure regularity of the solutions independently of the charges. The asymptotic symmetry algebra is given by a set of uundefined(1) \widehat{\mathfrak{u}}(1) current algebras. The associated charges generate higher-spin soft hair. We derive the entropy for solutions that are continuously connected to flat space cosmologies and find the same result as in the spin-2 case: the entropy is linear in the spin-2 zero-mode charges and independent from the spin-3 charges. Using twisted Sugawara-like constructions of higher-spin currents we show that our simple result for entropy of higherspin flat space cosmologies coincides precisely with the complicated earlier results expressed in terms of higher-spin zero mode charges.
Note:
  • 22 pages, A Mathematica workbook on ihs[$\lambda$] is included as an ancilliary file; v2: corrected minor misprints; v3: fixed minor issues with the display of some references
  • Chern-Simons Theories
  • Higher Spin Gravity
  • Higher Spin Symmetry
  • symmetry: algebra
  • dimension: 3
  • cosmological model
  • entropy
  • boundary condition
  • zero mode
  • hair