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Topic: Alain Aspect


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In the News (Mon 28 Dec 09)

  
  Alain Aspect - Wikipedia, the free encyclopedia
Alain Aspect (born 15 June 1947 in Agen) is a French physicist and alumnus of the École Normale Supérieure de Cachan in France.
Aspect's experiments were considered to provide overwhelming support to the thesis that Bell's inequalities are violated in its CHSH version.
Aspect was deputy director of the French "grande école" SupOptique until 1994.
en.wikipedia.org /wiki/Alain_Aspect   (327 words)

  
 The Holographic Universe - Crystalinks
At the University of Paris a research team led by physicist Alain Aspect performed what may turn out to be one of the most important experiments of the 20th century.
Aspect's experiment is related to the EPR Experiment, a consicousness experiment which had been devised by Albert Einstein, and his colleagues, Poldlsky and Rosen, in order to disprove Quantum Mechanics on the basis of the Pauli Exclusion Principle contradicting Special Relativity.
Aspect and his team discovered that under certain circumstances subatomic particles such as electrons are able to instantaneously communicate with each other regardless of the distance separating them.
www.crystalinks.com /holographic.html   (2936 words)

  
 Aspect | | Dictionary & Translation by Babylon
Aspect (computer science) is a feature that is linked to many parts of a program, but which is not necessarily the primary function of the program.
Grammatical aspect is a component of the conjugation of a verb having to do with the internal temporal flow of an event.
Lexical aspect is a distinction among different kinds of verb according to their relation to time.
www.babylon.com /definition/Aspect/All   (452 words)

  
 CNRS - Alain Aspect, physicist, CNRS 2005 Gold Medal   (Site not responding. Last check: 2007-10-09)
A talented experimenter, Alain Aspect has been interested all through his career in situations in which the predictions of quantum mechanics are far from being intuitive.
Alain Aspect was born in 1947 in Agen, in the French department of
Alain Aspect also spares no effort when it comes to the public understanding of science, whether by giving talks or by making contributions to books aimed at a non-specialized public, such as “Demain la Physique” (“Physics Tomorrow”), Odile Jacob, 2004 (chapter 5).
www2.cnrs.fr /en/394.htm   (877 words)

  
 CNRS - Alain Aspect : Shedding new light on light and atoms
Settling a 70-year-old dispute between Bohr and Einstein and breaking through a supposedly "insurmountable" barrier to absolute zero are some of the numerous achievements of Alain Aspect, recipient of the 2005 CNRS Gold Medal.
Alain Aspect, now 58, has made many breakthroughs in one of the most complex of scientific disciplines: quantum mechanics.
After graduating from the Ecole Normale Supérieure (ENS) in Cachan and successfully defending a first thesis in holography at the Université d'Orsay, Aspect was introduced in 1974 to the subject of his main thesis (“doctorat d'état”) through a famous paper by John Bell.
www2.cnrs.fr /presse/en/447.htm   (882 words)

  
 Experimental tests of Bell's inequality
A series of experiments conducted by Alain Aspect and his colleagues ended with one reported in 1982 in which polarizer angles were changed at a rapid enough rate to prevent light from either polarizer from reaching the more distant detection in time to influence the result[
The only reservation Aspect and his colleagues expressed for this experiment concerned the lack of randomness in the polarizer settings.
Aspect's experiment was widely regarded at the time as conclusive, especially in the popular press.
www.mtnmath.com /whatrh/node81.html   (2118 words)

  
 Aspect - Wikipedia, the free encyclopedia
Astrological aspect is the relative angle between two heavenly bodies.
Aspect (real estate) refers to the direction the property is facing (ie this house has a pleasant NE aspect with ocean views.
Alain Aspect, the French physicist of Bell test experiment fame.
en.wikipedia.org /wiki/Aspect   (277 words)

  
 Quantum Reflections - ed. John Ellis and Daniele Amati
In their contribution, John Bell and the moral aspect of quantum mechanics, Kurt Gottfried and N. David Mermin state that "Bell has had the greatest impact on the interpretation of quantum mechanics of anyone since the 1920s"; few would argue that this is not true.
As Alain Aspect notes in his piece, Testing Bell’s inequalities, one of the curious things about Bell's theorem was that, when he came up with it in the 1960s, there was no experimental data to go with it -- the situations Bell discussed had simply not yet been investigated.
Alain Aspect describes some of his well-known efforts in his short, clear paper.
www.complete-review.com /reviews/belljs/qreflect.htm   (960 words)

  
 Claude Cohen-Tannoudji - Autobiography
Alain died in 1993, of a long illness, at the age of 34.
New ideas were emerging from such an analysis related to, in particular, the interpretation of the mean value, the flucalations and the velocity dependence of dipole forces in terms of spatial gradients of dressed state energies and of spontaneous transitions between these dressed states.
At the same time, we were exploring, with Alain Aspect and Ennio Arimondo, the possibility of applying coherent population trapping to laser cooling.
nobelprize.org /nobel_prizes/physics/laureates/1997/cohen-tannoudji-autobio.html   (2629 words)

  
 New atom laser could improve navigation systems - tech - 16 November 2006 - New Scientist Tech
"One of the problems is that you don't have a well-defined wavelength and that is annoying," says Alain Aspect, the physicist who led the development of the new laser at the Charles Fabry Laboratory at the Institute of Optics in Paris, France.
Aspect's group got around the problem by using another light-based laser to ensure that the beam is perfectly horizontal, counteracting the effect of gravity — a feat that requires extraordinary precision.
Aspect believes atom lasers could ultimately be built into chip-like devices and then used to measure gravitational fields.
www.newscientisttech.com /article.ns?id=dn10593&feedId=online-news_rss20   (631 words)

  
 Découvrir > Alain Ducasse
" Alain Ducasse is a truly modern Chef – he fulfils the roles of chef, company director, team leader, school principal, head of PR and chief spokesman, head of personnel, talent spotter, teacher and coach.
He involves himself in every aspect of the business, from choosing interior designers, to recruiting staff, to launching his new restaurants in Monaco, Paris, New York, Moustiers-Sainte-Marie and even La Celle en Provence.
There is also the “Ducasse” label, seen at prestigious events in the Raffles Hotel in Singapore, at Margaux in the Bordeaux region, always in collaboration with the very best exponents in their field, to create products of the highest quality.
www.alain-ducasse.com /public_us/decouvrir/fr_alain.htm   (132 words)

  
 THE ULTIMATE UNIFICATION THEORY - The basic fundamental law of nature
In the summer of 1982, Alain Aspect and his co-workers, successfully conducted an historical experiment at the University of Paris.
In simple language, the Alain Aspect experiment has proved that two complementary particles that split and travelled at the speed of light in opposite directions, no matter how far they are apart, are always 'in communication' with each other.
The Alain Aspect experiment at the University of Paris can be considered crucial; as crucial as the Michelson and Morley experiment in 1887.
members.tripod.com /~bpramana/uut03.htm   (2527 words)

  
 Uncertain Principles: Top Eleven: Alain Aspect
Aspect and his colleagues demonstrated this in their first experiment.
There's another loophole here, though, if you set the polarizers in advance: some information could be transmitted from one detector to another, or from the detectors to the photon source, before the photons are emitted, and the states could be determined on that basis.
Ths is a hugely important step in our understanding of the world, because it shows that there's no way out of the weirdness of quantum theory-- the theory is bizarre, but it works, and any attempt to construct an alternative is going to have to account for some seriously odd stuff.
scienceblogs.com /principles/2006/02/top_eleven_alain_aspect.php   (2165 words)

  
 UFO Area Does Objective Reality Exist or is the Universe a Phantasm?   (Site not responding. Last check: 2007-10-09)
Since travelling faster than the speed of light is tantamount to breaking the time barrier, this daunting prospect has caused some physicists to try to come up with elaborate ways to explain away Aspect's more radical explanations.
And even if it is found that the holographic model does not provide the best explanation for the instantaneous communications that seem to be passing back and forth between subatomic particles, at the very least, as noted by Bail Hiley, a physicist at Birbeck College in London.
Aspect's findings "indicate that we must be prepared to consider radically new views of reality".
www.ufoarea.com /limits_holographic.html   (3390 words)

  
 Le physicien Alain Aspect, Médaille d'or 2005 du CNRS
Expérimentateur de talent, Alain Aspect s'est intéressé tout au long de sa carrière à des situations dans lesquelles les prédictions de la mécanique quantique sont très éloignées de l'intuition.
Bien que sa recherche soit de caractère fondamental, Alain Aspect est un chaud partisan du dialogue entre recherche amont et recherche appliquée.
Alain Aspect ne ménage pas non plus ses efforts dans le domaine de la vulgarisation de la science, que ce soit en donnant des conférences ou par ses contributions à des ouvrages destinés au public non spécialisé, notamment "Demain La Physique", Odile Jacob 2004 (chapitre 5).
www2.cnrs.fr /presse/communique/781.htm   (846 words)

  
 Method and apparatus for selectively controlling the quantum state probability distribution of correlated quantum ...
Alain Aspect et al., Experimental Tests of Realistic Local Theories via Bell's Theorem, Aug. 17, 1981, Phys.
Alain Aspect et al., Experimental Realization of Einstein-Podolsky-Rosen-Bohm Gedankenexperiment: A New Violation of Bell's Inequities, Jul. 12, 1982, Phys.
Alain Aspect et al., Experimental Test of Bell's Inequalities Using Time-Varying Analyzers, Dec. 20, 1982, Phys.
www.delphion.com /details?&pn=US06057541__   (562 words)

  
 EPR, Bell & Aspect: The Original References   (Site not responding. Last check: 2007-10-09)
Aspect performed the experiment which proved QM to be accurate.
Aspect, Dalibard, G. Roger: "Experimental test of Bell's inequalities using time-varying analyzers" Physical Review Letters 49 #25, 1804 (20 Dec 1982).
The last was the paper written in 1982 by Alain Aspect and two others.
www.drchinese.com /David/EPR_Bell_Aspect.htm   (948 words)

  
 Physics Colloquium Series » Special seminar: From Einstein intuition to quantum bits: The amazing properties of ...
Alain Aspect is a well-known personality in the field of quantum and atom optics.
He was also a pioneer in development of laser cooling of neutral atoms and is currently leading experiments in Bose-Einstein condensates that are at the cutting edge of the field.
Alain is currently senior researcher at CNRS (Laboratoire Charles Fabry de l’Institut d’Optique d’Orsay (Institut d’Optique/CNRS/Université Paris Sud 11), professor at the Ecole Polytechnique, and member of the French Academy of Sciences.
www.physics.uq.edu.au /colloquium/?p=35   (339 words)

  
 Home EPR effect
Although the reality of this phenomena has been solidly established experimentally (notably by the french team of Alain Aspect in 1983), its consequences remain obscure.
Let's imagine two particles which interact then distance themselves one from the other: These two twinned particles are said to be correlated, like for example two photons emitted by the same excited atom.
The experiments of Alain Aspect in 1983 came down cleanly in favour of the quantum interpretation.
www.epreffect.com   (757 words)

  
 Alain Aspect : repères biographiques - Les membres de l'Académie des sciences
Alain Aspect, né le 15 juin 1947, ancien élève de l'École normale supérieure de l'enseignement technique (ENSET), agrégé de physique, a été nommé sous-directeur de laboratoire au Collège de France, attaché à la chaire de physique atomique et moléculaire en 1985.
Alain Aspect a tout d'abord abordé le champ de l'optique classique, puis celui de l'optique quantique et plus récemment celui de l'optique atomique.
Dans sa thèse d'État portant sur les fondements de la mécanique quantique, Alain Aspect a mis en évidence la non séparabilité de la mécanique quantique, en démontrant la violation des inégalités de Bell pour une paire de photons intriqués, par trois expériences se rapprochant de plus en plus de l'expérience de pensée d'Einstein-Podolsky-Rosen-Bohm.
www.academie-sciences.fr /Membres/A/Aspect_Alain_bio.htm   (617 words)

  
 Does the EPR paradox prove that quantum theory is incomplete? Philosophy of Science at AhISee - the site for Insight
In 1982 Alain Aspect and his group carried out a definitive practical test of EPR, using instead of the electron/positron pair mentioned in the earlier example a pair of correlated photons as proposed in Bell's Inequality theorem.
The test involved the polarisation of the photons, and the decision as to which aspect of the polarisation to measure was taken after the photons were on their way by changing the state of an optical switch.
Gribbin points out that quibbles over Aspect are not really to the point; Bell proved that “… any interpretation of quantum theory must involve non-locality.” The Bell inequality is in fact violated on experiment, and not by the Aspect experiment alone; therefore, local reality must be abandoned, even if quantum theory is totally in error.
www.ahisee.com /content/epressay.html   (4612 words)

  
 Einstein's Folly and Aspect's Triumph   (Site not responding. Last check: 2007-10-09)
In Aspect’s experiment, the two photons were actually generated, and their spins measured about random axes (three of them, in the most successful version of the experiment).
Whenever the two axes were the same, the spins were opposite; but when they were different, their values didn’t show that the unmeasurable spins were the opposite of the one measured on the other photon on that axis.
In the interim between Bell’s publication of his Theorem and Aspect’s conduct of the actual experiment, some fairly tricky folks came up with another idea: perhaps, instead of local realism failing, you could interpret the experiment as a superluminal influence being sent from one side to the other.
www.gnn.tv /threads/12705/Einstein_s_Folly_and_Aspect_s_Triumph   (8580 words)

  
 Illusions
David Bohm, for example, believes Aspect’s findings imply that objective reality does not exist, that despite its apparent solidity the universe is at heart a phantasm, a gigantic and splendidly detailed hologram.
Zero-Point Energy of all charges in the universe being connected and that further mass is in all likelihood an illusion as well -- and both of these modern day theories of physics being in accordance with ancient traditions and philosophies, which claim the same connectedness of the diverse parts of the universe.]
If you remain unaware of the full scope of the situation, you might even conclude that the [two] fish must be instantaneously communicating with one another, but this is clearly not the case.
www.halexandria.org /dward405.htm   (3654 words)

  
 Holographic Universe
In fact unless you are in the habit of raiding scientific journals you probably you never even heard Aspect's name, though there are some who believe his discovery may change the face of science.
Since traveling than the speed of light is tantamount to breaking the time barrier, this daunting prospect has couched some physicists to try to come up the elaborate ways to explain away Aspect's findings.
University of London physicist David Bohm, for instance, believes Aspect's findings imply that objective reality does not exist, that despite the apparent solidity the universe is at heart a phantasm, a gigantic and splendidly detailed hologram.
cabiz.net /heartlink/holographic.htm   (3986 words)

  
 Comment Feed for: Top Eleven: Alain Aspect
I can't even remember specifically what he was speaking on, I just recall being impressed with his clarity and sense of excitement at a couple of Gordon Conferences in the 80s.
Ion trap experiments closed the loophole, but the ions were definitely not spacelike separated!) This loophole arises since we don't have perfectly efficient detectors and hence a local hidden variable theory can exploit this fact to "boost" its correlations.
One point that occasionally gets missed in discussions of this sort of "instantaneous communication" issue is that though the sender and reciever may be out of each other's event cones, they must both be in the event cone of whatever process produced the entanglement.
scienceblogs.com /principles/2006/02/top_eleven_alain_aspect.xml   (672 words)

  
 FNF: Entrepreneurship Conferences and Meetings  JE 2006-03-27  14.15       SOURCE: ...
Aspect's experiments were considered to provide overwhelming support to the thesis that
Alain Aspect set a precedent in 1982 (Aspect, 1982a).
Aspect and his team at Orsay, Paris, conducted three Bell tests using calcium cascade sources.
www.hi.is /~joner/eaps/bo_Entrepreneurship_Conferences_1.htm   (2009 words)

  
 Alain Aspect | THG Lexikon
Um 1980 arbeitete Aspect gemeinsam mit Jean Dalibard und Gérard Roger an einer experimentellen Überprüfung des EPR-Effektes.
In einem Experiment 1982 konnten sie nachweisen, dass die Bellschen Ungleichungen bei Messungen an verschränkten Photonen verletzt werden.
Aspect arbeitet am Forschungslaboratorium Charles Fabry des Institut d'Optique in Orsay, das gemeinsam vom CNRS und der Universität Paris-Süd betrieben wird.
www.tomshardware.de /lexikon/Alain_Aspect   (180 words)

  
 Third Page of Steve's UFOria
The 1960s Again: Stanford neurophysiologist Karl Pribram learns of the structure of holograms and combines it with Karl Lashley's ideas to conclude that memory is the result of nerve impulses ricocheting throughout the brain much in the way laser beams crisscross film with their interference patterns
To make a long story at least a little shorter, Aspect's ideas were taken to heart by one University of London quantum physicist David Bohm, who concluded that Aspect's discovery implied that the entire universe is both spatially and temporally holographic -- indeed, that it exists as a static entity outside of space/
, for example, believes Aspect's findings imply that objective reality does not exist, that despite its apparent solidity the universe is at heart a phantasm, a gigantic and splendidly detailed hologram.
thekeep.0catch.com /ufo/holo1a.htm   (4289 words)

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