We present a new operational framework for studying “superpositions of spacetimes,” which
are of fundamental interest in the development of a theory of quantum gravity. Our approach …

Observable signatures of the quantum nature of gravity at low energies have recently
emerged as a promising new research field. One prominent avenue is to test for …

Within any anticipated unifying theory of quantum gravity, it should be meaningful to
combine the fundamental notions of quantum superposition and spacetime to obtain so …

We analyze a tripartite entanglement harvesting protocol with three Unruh-DeWitt detectors
adiabatically interacting with a quantum scalar field in (3+ 1)-dimensional Minkowski …

A bstract We study the dynamics of an Unruh-DeWitt detector interacting with a massless
scalar field in an arbitrary static spherically symmetric spacetimes whose metric is …

We derive the gravitational field and the spacetime metric generated by sources in quantum
superposition of different locations. We start by working in a Newtonian approximation, in …

Without a complete theory of quantum gravity, the question of how quantum fields and
quantum particles behave in a superposition of spacetimes seems beyond the reach of …

A new approach for operationally studying the effects of spacetime in quantum
superpositions of semiclassical states has recently been proposed by some of the authors …

A promising method for understanding the geometric properties of a spacetime in the vicinity
of the horizon of a Kerr-like black hole can be developed by applying the antipodal …

A simple but powerful particle detector model consists of a two-level system coupled to a
field, where the detected particles are the field excitations. This is known as the Unruh …