TY - JOUR
T1 - Scalar charges and the first law of black hole thermodynamics
AU - Astefanesei, Dumitru
AU - Ballesteros, Romina
AU - Choque, David
AU - Rojas, Raúl
N1 - Publisher Copyright:
© 2018
PY - 2018/7/10
Y1 - 2018/7/10
N2 - We present a variational formulation of Einstein–Maxwell-dilaton theory in flat spacetime, when the asymptotic value of the scalar field is not fixed. We obtain the boundary terms that make the variational principle well posed and then compute the finite gravitational action and corresponding Brown–York stress tensor. We show that the total energy has a new contribution that depends on the asymptotic value of the scalar field and discuss the role of scalar charges for the first law of thermodynamics. We also extend our analysis to hairy black holes in Anti-de Sitter spacetime and investigate the thermodynamics of an exact solution that breaks the conformal symmetry of the boundary.
AB - We present a variational formulation of Einstein–Maxwell-dilaton theory in flat spacetime, when the asymptotic value of the scalar field is not fixed. We obtain the boundary terms that make the variational principle well posed and then compute the finite gravitational action and corresponding Brown–York stress tensor. We show that the total energy has a new contribution that depends on the asymptotic value of the scalar field and discuss the role of scalar charges for the first law of thermodynamics. We also extend our analysis to hairy black holes in Anti-de Sitter spacetime and investigate the thermodynamics of an exact solution that breaks the conformal symmetry of the boundary.
UR - http://www.scopus.com/inward/record.url?scp=85046747678&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2018.05.005
DO - 10.1016/j.physletb.2018.05.005
M3 - Article
AN - SCOPUS:85046747678
SN - 0370-2693
VL - 782
SP - 47
EP - 54
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -