In 1966, R. Penrose suggested the so-called spin network model to illustrate how the structure of quantum spacetime could look like, and, using combinatorial methods, he showed how the conformal structure of the Euclidean 3-space can be recovered…

In the presence of symmetry, the observables of a quantum field theory are described relative to a quantum reference frame (QRF).

We propose that quantum entanglement is a special sort of selection artefact, explicable as a combination of (i) collider bias and (ii) a boundary constraint on the collider variable.

Nanoparticles levitated in vacuum are expected to be a promising platform for various applications ranging from ultrasensitive accelerometers to investigations on macroscopic quantum physics and fundamental physics. In many applications, cooling the…

We present a Lie symmetry theoretical formulation of `relativistic' quantum mechanics with a Minkowski metric operator defining the inner product between state vectors, and a noncommutative geometric picture of spacetime naturally comes out of it. …

Higher-order transformations that act on a certain number of input quantum channels in an indefinite causal order — such as the quantum switch — cannot be described by standard quantum circuits that use the same number of calls of the input quantum…

What is the relationship between rational agency and the quantum? One way to approach this question is to focus on probabilism, the doctrine that rational beliefs ought to conform to the probability calculus. To the extent that the beliefs prescribed…

The Quantum Max Cut (QMC) problem has emerged as a test-problem for designing approximation algorithms for local Hamiltonian problems. In this talk we attack this problem using the algebraic structure of QMC; we will explore the relationship between…

The standard perspective on subsystems in quantum theory is a bottom-up, compositional one: one starts with individual "small" systems, viewed as primary, and composes them together to form larger systems. The top-down, decompositional perspective…