From Bell's inequalities to quantum information: a new quantum revolution

<!--HTML-->In 1935, with co-authors Podolsky and Rosen, Einstein discovered an intriguing quantum situation, in which particles in a pair are so strongly correlated that Schrödinger called them “entangled”. By analyzing that situation, Einstein concluded that the quantum formalism is incomplet...

Descripción completa

Detalles Bibliográficos
Autor principal: Prof. Aspect, Alain
Lenguaje:eng
Publicado: 2015
Materias:
Acceso en línea:http://cds.cern.ch/record/2116254
_version_ 1780949203792429056
author Prof. Aspect, Alain
author_facet Prof. Aspect, Alain
author_sort Prof. Aspect, Alain
collection CERN
description <!--HTML-->In 1935, with co-authors Podolsky and Rosen, Einstein discovered an intriguing quantum situation, in which particles in a pair are so strongly correlated that Schrödinger called them “entangled”. By analyzing that situation, Einstein concluded that the quantum formalism is incomplete. Niels Bohr immediately opposed that conclusion, and the debate lasted until the death of these two giants of physics. 
 In 1964, John Stuart Bell discovered that it is possible to settle the debate experimentally, by testing the famous "Bell's inequalities", and to show directly that the revolutionary concept of entanglement is indeed a reality. 

A long series of experiments closer and closer to the ideal scheme presented by Bell has confirmed that entanglement is indeed "a great quantum mystery", to use the words of Feynman. Based on that concept, a new field of research has emerged, quantum information, where one uses quantum bits, the so-called “qubits”, to encode the information and process it. Entanglement between qubits enables conceptually new methods for processing and transmitting information. Large-scale practical implementation of such concepts might revolutionize our society, as did the laser, the transistor and integrated circuits, some of the most striking fruits of the first quantum revolution, which began with the 20th century. To cite only the simplest example of these new concepts, quantum cryptography allows one to guarantee an absolute privacy of communications, based on the most fundamental laws of quantum mechanics.
id cern-2116254
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
record_format invenio
spelling cern-21162542022-11-02T22:19:46Zhttp://cds.cern.ch/record/2116254engProf. Aspect, AlainFrom Bell's inequalities to quantum information: a new quantum revolutionFrom Bell's inequalities to quantum information: a new quantum revolutionCERN Colloquium<!--HTML-->In 1935, with co-authors Podolsky and Rosen, Einstein discovered an intriguing quantum situation, in which particles in a pair are so strongly correlated that Schrödinger called them “entangled”. By analyzing that situation, Einstein concluded that the quantum formalism is incomplete. Niels Bohr immediately opposed that conclusion, and the debate lasted until the death of these two giants of physics. 
 In 1964, John Stuart Bell discovered that it is possible to settle the debate experimentally, by testing the famous "Bell's inequalities", and to show directly that the revolutionary concept of entanglement is indeed a reality. 

A long series of experiments closer and closer to the ideal scheme presented by Bell has confirmed that entanglement is indeed "a great quantum mystery", to use the words of Feynman. Based on that concept, a new field of research has emerged, quantum information, where one uses quantum bits, the so-called “qubits”, to encode the information and process it. Entanglement between qubits enables conceptually new methods for processing and transmitting information. Large-scale practical implementation of such concepts might revolutionize our society, as did the laser, the transistor and integrated circuits, some of the most striking fruits of the first quantum revolution, which began with the 20th century. To cite only the simplest example of these new concepts, quantum cryptography allows one to guarantee an absolute privacy of communications, based on the most fundamental laws of quantum mechanics. oai:cds.cern.ch:21162542015
spellingShingle CERN Colloquium
Prof. Aspect, Alain
From Bell's inequalities to quantum information: a new quantum revolution
title From Bell's inequalities to quantum information: a new quantum revolution
title_full From Bell's inequalities to quantum information: a new quantum revolution
title_fullStr From Bell's inequalities to quantum information: a new quantum revolution
title_full_unstemmed From Bell's inequalities to quantum information: a new quantum revolution
title_short From Bell's inequalities to quantum information: a new quantum revolution
title_sort from bell's inequalities to quantum information: a new quantum revolution
topic CERN Colloquium
url http://cds.cern.ch/record/2116254
work_keys_str_mv AT profaspectalain frombellsinequalitiestoquantuminformationanewquantumrevolution