359 citations · 563 across the 17 of their papers we have counts for
6 papers · 1 filter
Astrometry meets Pulsar Timing Arrays: Synergies for Gravitational Wave Detection
N. M. Jiménez Cruz, Ameek Malhotra, Gianmassimo Tasinato +1
High-precision astrometry offers a promising approach to detect low-frequency gravitational waves, complementing pulsar timing array (PTA) observations. We explore the response of…
Cosmological tests of quintessence in quantum gravity
Sukannya Bhattacharya, Giulia Borghetto, Ameek Malhotra +3
We use a suite of the most recent cosmological observations to test models of dynamical dark energy motivated by quantum gravity. Specifically, we focus on hilltop quintessence sce…
A novel probe of graviton dispersion relations at nano-Hertz frequencies
Bill Atkins, Ameek Malhotra, Gianmassimo Tasinato
We generalise Phinney's 'practical theorem' to account for modified graviton dispersion relations motivated by certain cosmological scenarios. Focusing on specific examples, we sho…
Measuring the circular polarization of gravitational waves with pulsar timing arrays
N. M. Jiménez Cruz, Ameek Malhotra, Gianmassimo Tasinato +1
The circular polarization of the stochastic gravitational wave background (SGWB) is a key observable for characterising the origin of the signal detected by Pulsar Timing Array (PT…
Cosmological constraints on curved quintessence
Sukannya Bhattacharya, Giulia Borghetto, Ameek Malhotra +3
Dynamical dark energy has gained renewed interest due to recent theoretical and observational developments. In the present paper, we focus on a string-motivated dark energy set-up,…
Measuring kinematic anisotropies with pulsar timing arrays
N. M. Jiménez Cruz, Ameek Malhotra, Gianmassimo Tasinato +1
Recent Pulsar Timing Array (PTA) collaborations show strong evidence for a stochastic gravitational wave background (SGWB) with the characteristic Hellings-Downs inter-pulsar corre…