Quantum decoherence plays a pivotal role in the dynamical description of the quantum-to-
classical transition and is the main impediment to the realization of devices for quantum …

The manner in which states of some quantum systems become effectively classical is of
great significance for the foundations of quantum physics, as well as for problems of …

The counter-intuitive aspects of quantum physics have been for long illustrated by thought
experiments, from Einstein's photon box to Schrödinger's cat. These experiments have now …

Quantum mechanics works exceedingly well in all practical applications. No example of
conflict between its predictions and experiment is known. Without quantum physics we could …

Over the course of the past decade, decoherence has become a ubiquitous scienti? c term
popular in all kinds of research, from fundamental theories of quantum physics to …

Environment-induced decoherence and superselection have been a subject of intensive
research over the past two decades, yet their implications for the foundational problems of …

This report reviews what quantum physics and information theory have to tell us about the
age-old question, How come existence? No escape is evident from four conclusions:(1) The …

The aim of this paper is to provide a general introduction to the problem of time in quantum
gravity. This problem originates in the fundamental conflict between the way the concept …

We use the influence functional path-integral method to derive an exact master equation for
the quantum Brownian motion of a particle linearly coupled to a general environment …

The problem of time in quantum gravity calls for a relational solution. Using quantum
reduction maps, we establish a previously unknown equivalence between three approaches …