Imperial College London
Alternate

DrDavidJennings

Faculty of Natural Sciences, Department of Physics

Research Associate
 
 
 
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Contact

 

+44 (0)20 7594 0971d.jennings Website

 
 
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Location

 

Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Jennings:2015:10.1080/00107514.2015.1063233,
author = {Jennings, D and Leifer, M},
doi = {10.1080/00107514.2015.1063233},
journal = {Contemporary Physics},
pages = {60--82},
title = {No return to classical reality},
url = {http://dx.doi.org/10.1080/00107514.2015.1063233},
volume = {57},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - At a fundamental level, the classical picture of the world is dead, and has been dead now for almost a century. Pinning down exactly which quantum phenomena are responsible for this has proved to be a tricky and controversial question, but a lot of progress has been made in the past few decades. We now have a range of precise statements showing that whatever the ultimate laws of nature are, they cannot be classical. In this article, we review results on the fundamental phenomena of quantum theory that cannot be understood in classical terms. We proceed by first granting quite a broad notion of classicality, describe a range of quantum phenomena (such as randomness, discreteness, the indistinguishability of states, measurement-uncertainty, measurement-disturbance, complementarity, non-commutativity, interference, the no-cloning theorem and the collapse of the wave-packet) that do fall under its liberal scope, and then finally describe some aspects of quantum physics that can never admit a classical understanding – the intrinsically quantum mechanical aspects of nature. The most famous of these is Bell’s theorem, but we also review two more recent results in this area. Firstly, Hardy’s theorem shows that even a finite-dimensional quantum system must contain an infinite amount of information, and secondly, the Pusey–Barrett–Rudolph theorem shows that the wave function must be an objective property of an individual quantum system. Besides being of foundational interest, results of this sort now find surprising practical applications in areas such as quantum information science and the simulation of quantum systems.
AU  - Jennings,D
AU  - Leifer,M
DO  - 10.1080/00107514.2015.1063233
EP  - 82
PY  - 2015///
SN  - 0010-7514
SP  - 60
TI  - No return to classical reality
T2  - Contemporary Physics
UR  - http://dx.doi.org/10.1080/00107514.2015.1063233
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000371036500004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/52206
VL  - 57
ER  -
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