The superposition principle is the cornerstone of quantum mechanics, leading to a variety of
genuinely quantum effects. Whether the principle applies also to macroscopic systems or …

In this paper, we review and connect the three essential conditions needed by the collapse
model to achieve a complete and exact formulation, namely the theoretical, the …

This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom
Interferometry Workshop hosted by CERN. The workshop brought together experts from …

We report on the two-dimensional (2D) dynamics of a levitated nanoparticle in an optical
cavity. The motion of the nanosphere is strongly coupled to the cavity field by coherent …

Matter-wave interferometers have fundamental applications for gravity experiments such as
testing the equivalence principle and the quantum nature of gravity. In addition, matter-wave …

Advances in quantum technologies are giving rise to a revolution in the way fundamental
physics questions are explored at the empirical level. At the same time, they are the seeds …

Simulating quantum features of quantum systems is an important path to approaching
quantum technologies and understanding the physical world. This paper inspects the …

Noninterferometric experiments have been successfully employed to constrain models of
spontaneous wave function collapse, which predict a violation of the quantum superposition …

Gravitational decoherence (GD) refers to the effects of gravity in actuating the classical
appearance of a quantum system. Because the underlying processes involve issues in …

The Diósi–Penrose model states that the wave function collapse ending a quantum
superposition occurs due to the instability of coexisting gravitational potentials created by …