Gravitational entropy and thermodynamics away from the horizon

**Authors:**Brustein, R , Medved, A J M**Date:**2012**Language:**English**Type:**Article**Identifier:**vital:6818 , http://hdl.handle.net/10962/d1004328**Description:**We define, by an integral of geometric quantities over a spherical shell of arbitrary radius, an invariant gravitational entropy. This definition relies on defining a gravitational energy and pressure, and it reduces at the horizon of both black branes and black holes to Wald's Noether charge entropy. We support the thermodynamic interpretation of the proposed entropy by showing that, for some cases, the field theory duals of the entropy, energy and pressure are the same as the corresponding quantities in the field theory. In this context, the Einstein equations are equivalent to the field theory thermodynamic relation TdS=dE+PdV supplemented by an equation of state**Full Text:****Date Issued:**2012

**Authors:**Brustein, R , Medved, A J M**Date:**2012**Language:**English**Type:**Article**Identifier:**vital:6818 , http://hdl.handle.net/10962/d1004328**Description:**We define, by an integral of geometric quantities over a spherical shell of arbitrary radius, an invariant gravitational entropy. This definition relies on defining a gravitational energy and pressure, and it reduces at the horizon of both black branes and black holes to Wald's Noether charge entropy. We support the thermodynamic interpretation of the proposed entropy by showing that, for some cases, the field theory duals of the entropy, energy and pressure are the same as the corresponding quantities in the field theory. In this context, the Einstein equations are equivalent to the field theory thermodynamic relation TdS=dE+PdV supplemented by an equation of state**Full Text:****Date Issued:**2012

Graviton n-point functions for UV-complete theories in Anti-de Sitter space

**Authors:**Brustein, R , Medved, A J M**Date:**2012**Language:**English**Type:**text , Article**Identifier:**vital:6820 , http://hdl.handle.net/10962/d1004427**Description:**We calculate graviton n-point functions in an anti-de Sitter black brane background for effective gravity theories whose linearized equations of motion have at most two time derivatives. We compare the n-point functions in Einstein gravity to those in theories whose leading correction is quadratic in the Riemann tensor. The comparison is made for any number of gravitons and for all physical graviton modes in a kinematic region for which the leading correction can significantly modify the Einstein result. We find that the n-point functions of Einstein gravity depend on at most a single angle, whereas those of the corrected theories may depend on two angles. For the four-point functions, Einstein gravity exhibits linear dependence on the Mandelstam variable s versus a quadratic dependence on s for the corrected theory.**Full Text:****Date Issued:**2012

**Authors:**Brustein, R , Medved, A J M**Date:**2012**Language:**English**Type:**text , Article**Identifier:**vital:6820 , http://hdl.handle.net/10962/d1004427**Description:**We calculate graviton n-point functions in an anti-de Sitter black brane background for effective gravity theories whose linearized equations of motion have at most two time derivatives. We compare the n-point functions in Einstein gravity to those in theories whose leading correction is quadratic in the Riemann tensor. The comparison is made for any number of gravitons and for all physical graviton modes in a kinematic region for which the leading correction can significantly modify the Einstein result. We find that the n-point functions of Einstein gravity depend on at most a single angle, whereas those of the corrected theories may depend on two angles. For the four-point functions, Einstein gravity exhibits linear dependence on the Mandelstam variable s versus a quadratic dependence on s for the corrected theory.**Full Text:****Date Issued:**2012

- «
- ‹
- 1
- ›
- »