64 citations · 142 across the 4 of their papers we have counts for
8 papers
Spacetime Curvature in terms of Scalar Field Propagators
Mehdi Saravani, Siavash Aslanbeigi, Achim Kempf
We show how quantum fields can be used to measure the curvature of spacetime. In particular, we find that knowledge of the imprint that spacetime curvature leaves in the correlator…
Dark Matter From Spacetime Nonlocality
Mehdi Saravani, Siavash Aslanbeigi
We propose that dark matter is not yet another new particle in nature, but that it is a remnant of quantum gravitational effects on known fields. We arrive at this possibility in a…
On the Causal Set-Continuum Correspondence
Mehdi Saravani, Siavash Aslanbeigi
We present two results which concern certain aspects of the question: when is a causal set well approximated by a Lorentzian manifold? The first result is a theorem which shows tha…
Generalized Causal Set d'Alembertians
Siavash Aslanbeigi, Mehdi Saravani, Rafael D. Sorkin
We introduce a family of generalized d'Alembertian operators in D-dimensional Minkowski spacetimes which are manifestly Lorentz-invariant, retarded, and non-local, the extent of th…
A preferred ground state for the scalar field in de Sitter space
Siavash Aslanbeigi, Michel Buck
We investigate a recent proposal for a distinguished vacuum state of a free scalar quantum field in an arbitrarily curved spacetime, known as the Sorkin-Johnston (SJ) vacuum, by ap…
An Optimal and Model-Independent Measurement of the Intracluster Pressure Profile I: Methodology and First Applications
Siavash Aslanbeigi, Guilhem Lavaux, Amir Hajian +1
We present a statistically-optimal and model-independent method to extract the pressure profile of hot gas in the intracluster medium (ICM). Using the thermal Sunyaev-Zeldovich eff…