56 citations · 178 across the 8 of their papers we have counts for
7 papers · 1 filter
The yes boundaries wavefunctions of the universe
Batoul Banihashemi, Gauri Batra, Y. T. Albert Law +2
A generic spacetime topology contains timelike boundaries. Making use of two such boundaries, we formulate a microscopic holographic dual that captures cosmological spacetime beyon…
Thermal effective actions from conformal boundary conditions in gravity
Batoul Banihashemi, Edgar Shaghoulian, Sanjit Shashi
Recent work has studied the thermodynamics of gravity subjected to conformal boundary conditions, where the trace of the extrinsic curvature and the conformal class of metrics…
The enigmatic gravitational partition function
Batoul Banihashemi, Ted Jacobson
The saddle point approximation to formal quantum gravitational partition functions has yielded plausible computations of horizon entropy in various settings, but it stands on shaky…
Flat space gravity at finite cutoff
Batoul Banihashemi, Edgar Shaghoulian, Sanjit Shashi
We study the thermodynamics of Einstein gravity with vanishing cosmological constant subjected to conformal boundary conditions. Our focus is on comparing the series of subextensiv…
On the lapse contour in the gravitational path integral
Batoul Banihashemi, Ted Jacobson
The gravitational path integral is usually implemented with a covariant action by analogy with other gauge field theories, but the gravitational case is different in important ways…
The minus sign in the first law of de Sitter horizons
Batoul Banihashemi, Ted Jacobson, Andrew Svesko +1
Due to a well-known, but curious, minus sign in the Gibbons-Hawking first law for the static patch of de Sitter space, the entropy of the cosmological horizon is reduced by the add…
Thermodynamic ensembles with cosmological horizons
Batoul Banihashemi, Ted Jacobson
The entropy of a de Sitter horizon was derived long ago by Gibbons and Hawking via a gravitational partition function. Since there is no boundary at which to define the temperature…