The traditional view from particle physics is that quantum-gravity effects should become
detectable only at extremely high energies and small length scales. Owing to the significant …

The gravitational wave (GW) spectrum at frequencies above a kHz is a largely unexplored
frontier. We show that detectors with sensitivity to single-phonon excitations in crystal targets …

We investigate gravitational-wave backgrounds (GWBs) of primordial origin that would
manifest only at ultrahigh frequencies, from kilohertz to 100 gigahertz, and leave no signal at …

We apply the inverse Gertsenshtein effect, ie, the graviton-photon conversion in the
presence of a magnetic field, to constrain high-frequency gravitational waves (HFGWs) …

A defining signature of classical systems is “in principle measurability” without disturbance: a
feature manifestly violated by quantum systems. We describe a multi-interferometer …

By utilizing quantum optics techniques, we examine the characteristics of a quantum
gravitational wave (GW) signature at interferometers. In particular, we study the problem by …

Experimental proposals for testing quantum gravity-induced entanglement of masses
(QGEM) typically involve two interacting masses which are each in a spatial superposition …

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 …

It is possible to make a detector which clicks after absorbing a single graviton. Similarly, it is
possible to make a gravitational wave detector which can see the quantum noise induced by …

The coupling between acoustic vibrations in a lithium niobate bulk acoustic wave resonator
and microwave photons of a re-entrant microwave cavity was investigated at a temperature …