Transmission of a Cartesian Frame by a Quantum System
Asher Peres,Petra F. Scudo +1 more
TLDR
The algorithm for decoding a quantum state prepared in a superposition of states belonging to different irreducible representations of the rotation group is presented, and the fidelity of transmission is evaluated.Abstract:
A single quantum system, such as a hydrogen atom, can transmit a Cartesian coordinate frame (three axes). For this it has to be prepared in a superposition of states belonging to different irreducible representations of the rotation group. The algorithm for decoding such a state is presented, and the fidelity of transmission is evaluated.read more
Citations
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Quantum-enhanced measurements: beating the standard quantum limit.
TL;DR: This work has shown that conventional bounds to the precision of measurements such as the shot noise limit or the standard quantum limit are not as fundamental as the Heisenberg limits and can be beaten using quantum strategies that employ “quantum tricks” such as squeezing and entanglement.
Journal ArticleDOI
Reference frames, superselection rules, and quantum information
TL;DR: This paper reviews the role of reference framesmore and superselection rules in the theory of quantum-information processing and finds that quantum unspeakable information becomes a new kind of resource that can be manipulated, depleted, quantified, etc.
Journal ArticleDOI
Quantum Information and Relativity Theory
Asher Peres,Daniel R. Terno +1 more
TL;DR: In particular, when black holes (or more generally, event horizons) are involved most of the current concepts in quantum information theory may then require a reassessment as discussed by the authors, in particular when black hole horizons are involved.
Journal ArticleDOI
Observable measure of quantum coherence in finite dimensional systems.
TL;DR: An experimental scheme is presented implementable with current technology which evaluates the quantum coherence of an unknown state of a d-dimensional system by performing two programmable measurements on an ancillary qubit, in place of the O(d2) direct measurements required by full state reconstruction.
Repository
Bibliographic guide to the foundations of quantum mechanics and quantum information
TL;DR: A collection of references (papers, books, preprints, book reviews, Ph. D. thesis, patents, web sites, etc.), sorted alphabetically and classified by subject, on foundations of quantum mechanics and quantum information can be found in this article.
References
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Angular Momentum in Quantum Mechanics
TL;DR: In this paper, the angular momentum, one of the most fundamental quantities in all of quantum mechanics, is introduced and a concise introduction to its application in atomic, molecular, and nuclear physics is provided.
Book
Angular Momentum in Quantum Mechanics
TL;DR: In this article, the angular momentum, one of the most fundamental quantities in all of quantum mechanics, is introduced and a concise introduction to its application in atomic, molecular, and nuclear physics is provided.
Book
Quantum detection and estimation theory
TL;DR: In this article, the optimum procedure for choosing between two hypotheses, and an approximate procedure valid at small signal-to-noise ratios and called threshold detection, are presented, and a quantum counterpart of the Cramer-Rao inequality of conventional statistics sets a lower bound to the mean-square errors of such estimates.