Operational contextuality forms a rapidly develo** subfield of quantum information theory.
However, the characterization of the quantum mechanical entities that fuel the phenomenon …

We consider how to tell the time-ordering associated with measurement data from quantum
experiments at two times and any number of qubits. We define an arrow of time inference …

A simple minimalist argument is given for why some correlations between quantum systems
boggle our classical intuition. The argument relies on two elementary physical assumptions …

We consider the quantum version of inferring the causal relation between events. There has
been recent progress towards identifying minimal interventions and observations needed …

We consider the certification of temporal quantum correlations using the pseudo-density
matrix (PDM), an extension of the density matrix to the time domain, where negative …

We develop a framework for characterizing quantum temporal correlations in a general
temporal scenario, in which an initial quantum state is measured, sent through a quantum …

The Local Friendliness argument is an extended Wigner's friend no-go theorem that
provides strong constraints on the nature of reality--stronger even than those imposed by …

Many problems in quantum information theory can be formulated as optimizations over the
sequential outcomes of dynamical systems subject to unpredictable external influences …

In recent years, time correlators have received renewed attention, especially under the guise
of identifiers of nonclassical correlations. However, the physical interpretation of these …

In this paper, we focus on the underlying quantum structure of temporal correlations and
show their peculiar nature which differentiates them from spatial quantum correlations. With …