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The Quantum State of a Propagating Laser Field
S. J. van Enk, Christopher A. Fuchs
Optical implementations of quantum communication protocols typically involve laser fields. However, the standard description of the quantum state of a laser field is surprisingly i…
Quantum Foundations in the Light of Quantum Information
Christopher A. Fuchs
This paper reports three almost trivial theorems that nevertheless appear to have significant import for quantum foundations studies. 1) A Gleason-like derivation of the quantum pr…
Quantum probabilities as Bayesian probabilities
Carlton M. Caves, Christopher A. Fuchs, Ruediger Schack
In the Bayesian approach to probability theory, probability quantifies a degree of belief for a single trial, without any a priori connection to limiting frequencies. In this paper…
Notes on a Paulian Idea: Foundational, Historical, Anecdotal and Forward-Looking Thoughts on the Quantum
Christopher A. Fuchs, N. David Mermin
This document is the first installment of three in the Cerro Grande Fire Series. It is a collection of letters written to various colleagues, most of whom regularly circuit this ar…
Unknown Quantum States: The Quantum de Finetti Representation
Carlton M. Caves, Christopher A. Fuchs, Ruediger Schack
We present an elementary proof of the quantum de Finetti representation theorem, a quantum analogue of de Finetti's classical theorem on exchangeable probability assignments. This…
The Quantum State of an Ideal Propagating Laser Field
S. J. van Enk, Christopher A. Fuchs
We give a quantum information-theoretic description of an ideal propagating CW laser field and reinterpret typical quantum-optical experiments in light of this. In particular we sh…