We consider two interacting systems when one is treated classically while the other system
remains quantum. Consistent dynamics of this coupling has been shown to exist, and …

The effort to discover a quantum theory of gravity is motivated by the need to reconcile the
incompatibility between quantum theory and general relativity. Here, we present an …

We revisit the Bose-Marletto-Vedral (BMV) tabletop experimental proposal—which aims to
witness quantum gravity using gravity-mediated entanglement—analyzing the role of locality …

The standard notion of a classical limit, represented schematically by ℏ→ 0, provides a
method for approximating a quantum system by a classical one. In this work, we explain why …

A concise and self-contained derivation of hybrid quantum-classical dynamics is given in
terms of Markovian master equations. Many previously known results are rederived and …

Upon revisiting the Hamiltonian structure of classical wavefunctions in Koopman–von
Neumann theory, this paper addresses the long-standing problem of formulating a …

A bstract We study a class of theories in which space-time is treated classically, while
interacting with quantum fields. These circumvent various no-go theorems and the …

A gauge-invariant wave equation for the dynamics of hybrid quantum–classical systems is
formulated by combining the variational setting of Lagrangian paths in continuum theories …

This paper extends the Madelung–Bohm formulation of quantum mechanics to describe the
time-reversible interaction of classical and quantum systems. The symplectic geometry of the …

Consistent dynamics which couples classical and quantum degrees of freedom exists,
provided it is stochastic. This dynamics is linear in the hybrid state, completely positive and …