Abstract The Laser Interferometer Space Antenna (LISA) has two scientific objectives of
cosmological focus: to probe the expansion rate of the universe, and to understand …

Among all cosmological quantum-gravity or quantum-gravity-inspired scenarios, only very
few predict a blue-tilted primordial tensor spectrum. We explore five of them and check …

Given the Loop-Quantum-Gravity (LQG) non-graph-changing Hamiltonian $\widehat {H [N]}
$, the coherent state expectation value $\langle\widehat {H [N]}\rangle $ admits an …

Given the nongraph-changing Hamiltonian H [N]^ in loop quantum gravity (LQG), H [N]^, the
coherent state expectation value of H [N]^, admits a semiclassical expansion in ℓ p 2. In this …

The linearized Einstein field equations provide a low-energy wave equation for the
propagation of gravitational fields which may originate from a high-energy source. Motivated …

We compute the expected response of detector arms of gravitational wave observatories to
polymerized gravitational waves. The mathematical and theoretical features of these waves …

One of the critical components of loop quantum gravity and cosmology (LQC)—the
Thiemann regularization procedure—is nonunique. Different choices of particular …

We apply the full theory of Loop Quantum Gravity (LQG) to cosmology and present a top-
down derivation of gauge-invariant cosmological perturbation theory from quantum gravity …

The fundamental physical description of the Universe is based on two theories: Quantum
Mechanics and General Relativity. Unified theory of Quantum Gravity (QG) is an open …

Based on optical medium analogy, we establish a formalism to describe the interaction
between an electromagnetic (EM) system with gravitational waves (GWs) background. After …