The exploration of the universe has recently entered a new era thanks to the multi-
messenger paradigm, characterized by a continuous increase in the quantity and quality of …

The quantization of gravity is widely believed to result in gravitons–particles of discrete
energy that form gravitational waves. But their detection has so far been considered …

We revisit a question asked by Dyson:“Is a graviton detectable?” We demonstrate that in
both Dyson's original sense and in a more modern measurement-theoretic sense, it is …

A bstract It is well-known that the primordial scalar curvature and tensor perturbations, ζ and
γ ij, are conserved on super-horizon scales in minimal inflation models. However, their wave …

This paper investigates the decoherence effect resulting from the interaction of squeezed
gravitational waves with a system of massive particles in spatial superposition. This paper …

In this work we consider the effects of gravitons and their fluctuations on the dynamics of two
masses using the Feynman-Vernon influence functional formalism, applied earlier to …

We propose a multi-mode bar consisting of mass elements of decreasing size for the direct
detection of stimulated absorption of up to kHz gravitons from a neutron star merger and post …

A bstract We consider a timelike geodesic congruence in the presence of perturbative
quantum fluctuations of the spacetime metric. We calculate the change in the volume of a …

The theory of inflation provides a mechanism to explain the structures we observe today in
the Universe, starting from quantum-mechanically generated fluctuations. However, this …

We study the effective stochastic dynamics of a semiclassical probe induced by linear
optomechanical interactions with a quantum oscillator. To do so, we introduce path integrals …