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Topic: John Stewart Bell


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In the News (Thu 4 Dec 08)

  
  John Stewart Bell - Wikipedia, the free encyclopedia
John S. Bell (June 28, 1928 – October 1, 1990) was a physicist who became well known as the originator of Bell's Theorem, regarded by some in the quantum physics community as one of the most important theorems of the 20th century.
Bell became a supporter of the Bohm interpretation, a nonlocal hidden variable theory involving superluminal signalling, calling its suppression a "scandal" within physics, and took to defending his work against those whom he perceived as distorting its meaning to favor indeterministic quantum mechanics such as the Copenhagen and Everett "many-worlds" interpretations.
Bell died unexpectedly of a cerebral haemorrhage in Belfast in 1990.
en.wikipedia.org /wiki/John_Stewart_Bell   (728 words)

  
 EPR paradox
It was not fully resolved until 1964, when John Stewart Bell derived the Bell inequalities, which showed that there are observable differences between quantum mechanics and alternative hidden variable theories.
In 1964, Bell derived the Bell inequalities, showing that quantum mechanics could be experimentally distinguished from a very broad class of local hidden variable theories.
Bell's thought experiment is statistical: Alice and Bob must carry out several measurements to obtain P(a+,b+), and the other probabilities.
www.ebroadcast.com.au /lookup/encyclopedia/ep/EPR_paradox.html   (1717 words)

  
 Bell_John   (Site not responding. Last check: 2007-11-07)
John Bell's great achievement was that during the 1960s he was able to breathe new and exciting life into the foundations of quantum theory, a topic seemingly exhausted by the outcome of the Bohr-Einstein debate thirty years earlier, and ignored by virtually all those who used quantum theory in the intervening period.
Bell was able to show that discussion of such concepts as 'realism', 'determinism' and 'locality' could be sharpened into a rigorous mathematical statement, 'Bell's inequality', which is capable of experimental test.
Bell then spent a year as a technician in the Physics Department at Queen's University Belfast, where the senior members of staff in the Department, Professor Karl Emeleus and Dr Robert Sloane, were exceptionally helpful, lending Bell books and allowing him to attend the first year lectures.
www-gap.dcs.st-and.ac.uk /~history/Mathematicians/Bell_John.html   (2942 words)

  
 John Stewart Bell Biography / Biography of John Stewart Bell World of Physics Biography
John Stewart Bell was a humorous, peaceful quantum physicist of the twentieth century.
Bell warned that all of the factors contributing to the communication between particles are currently unknown and unobservable.
Bell was born in 1928 to working-class parents in Belfast, Northern Ireland.
www.bookrags.com /biography-john-stewart-bell-wop   (428 words)

  
 John Bell - Wikipedia, the free encyclopedia
John Bell (academic) D.D., Master of Jesus College, Cambridge 1579–1589 in England
John Bell (surgeon), (1763-1820), brother of Charles Bell
John Bell (explorer) (1799–1868), Hudson's Bay Company governor and explorer of the Mackenzie and Yukon River areas
en.wikipedia.org /wiki/John_Bell   (162 words)

  
 Article: John Stewart Bell and the most profound discovery of science   (Site not responding. Last check: 2007-11-07)
Bell derived a theorem of quantum physics which says that particles generated as a pair remain connected in some fashion even if they have travelled apart and are vast distances away from each other.
John Stewart Bell was born on July 28, 1928 in Belfast, Northern Ireland to John and Annie Bell.
Bell showed that when an experimenter makes a measurement on one particle, the effect of measurement is to change the same property of the paired counterpart simultaneously, regardless of the distance between them.
www.datadiwan.de /SciMedNet/Leadarts/Coulson_JSBell.htm   (5022 words)

  
 Quantum Reflections - ed. John Ellis and Daniele Amati
Bell and his work are, however, the unifying thread behind the pieces, and the collection as a whole does stand as a neat Festschrift for the great scientist.
John Bell (1928-1990) was a remarkable scientist who spent most of his career at CERN (from 1960-1990, with only one interruption).
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.
www.complete-review.com /reviews/belljs/qreflect.htm   (960 words)

  
 Toward a Science of Meaning   (Site not responding. Last check: 2007-11-07)
Irish physicist John Stewart Bell studied an earlier experimental conundrum created by the team of Einstein, Podolsky, and Rosen that pointed to a conceptual problem in the quantum theory as it had to do with the spin elements of two photons at a distance.
John Bell used the same EPR results, but devised a constraint on the spin systems that was based upon relativity theory (local effects), which implied that a change in one photon’s spin would not affect the second photon at all.
In a very real sense, what Thomas Bell saw when he peered deeply into the quantum world was no different than what Galileo saw when he viewed the heavens for the first time through his telescope: a small but lethal aberration in an entire system of thought.
www.newtimes.org /issue/0201/meaning.htm   (1614 words)

  
 Review: COLD TERROR: HOW CANADA NURTURES AND EXPORTS TERRORISM AROUND THE WORLD By Stewart Bell   (Site not responding. Last check: 2007-11-07)
Bell observes, “The only mainstream organizations that consistently lobby against terrorism are Jewish community groups, because Jews are so often the targets of terror.” (p.xix) He has given an account of tremendous carnage caused by Canadian terrorism.
Discarding the established notion, Bell argues that the ever-increasing involvement of the youths in most damaging missions of the Al Qaeda cannot be explained on the ground of their poverty, illiteracy and frustrations.
Bell concludes with the alarm that a group of fanatics want to convince Muslims that theirs is the one true faith and it is their duty and right to take over the world with force.
www.futureislam.com /20050501/review/afroz/Cold_terror_prn.asp   (1490 words)

  
 Rockzillaworld John Stewart "Havana" By Marianne Ebertowski   (Site not responding. Last check: 2007-11-07)
Stewart's voice has become the voice of an old man, comparisons with Johnny Cash and Guy Clark are not far-fetched.
There is melancholy, sadness and defiance in "Starman," where Stewart is joined by Noelle Ford (presumably his daughter) on viola and in "Dogs in the Bed," a metaphor for not being able to deal with anything because of constant diversions and worries.
Frankly, I could have done without "Turn of the Century (Diana)," Stewart's version of the story behind the sudden death of the princess of Wales, in spite of the fact that it is considerably less awful than Dale Watson's attempt to cover the same subject.
www.rockzilla.net /ebertowski20.html   (672 words)

  
 John Stewart Bell   (Site not responding. Last check: 2007-11-07)
John Stewart Bell (June 28 1928 - October 1 1990) was an Irish physicist.
In 1964 he derived an inequality that must be satisfied for there to be a local hidden-variable theory of quantum mechanics.
Bell became a supporter of the Bohm interpretation, a nonlocal hidden-variable theory involving supraluminal signaling, calling its suppression a "scandal" within physics, and took to defending his work against those whom he perceived as distorting its meaning to favor indeterministic quantum mechanics such as the Copenhagen and Everett "many-worlds interpretations.
www.sciencedaily.com /encyclopedia/john_stewart_bell   (455 words)

  
 CNN.com - Transcripts
STEWART: Well, I still go to ones that mean a lot to either the organization or to me. I have not the time to do the more frivolous things that I once was able to do, because, you know, I'm busy with all of this.
STEWART: Well, you know, I remember my sister telling me when she was in a wheelchair -- she had broken her ankle -- that people kind of, oh, were shocked and kind of moved back.
STEWART: Well, sort of coming to a screeching halt and having to deal with something extremely unpleasant, something that saddens and disheartens me. And something that is very, very difficult not only for me, but for everyone I work with, my family, my friends.
transcripts.cnn.com /TRANSCRIPTS/0312/22/lkl.00.html   (5805 words)

  
 John Stewart Bell   (Site not responding. Last check: 2007-11-07)
John S. Bell (June 28 1928 - October 1 1990) was a physicist (A scientist trained in physics) who became well known as the originator of Bell's Theorem (additional info and facts about Bell's Theorem), regarded by some in the quantum physics community as one of the most important theorems of the 20th century.
He was born in Belfast (Capital and largest city of Northern Ireland; the center of Protestantism in Northern Ireland), Northern Ireland (A division of the United Kingdom located on the northern part of the island of Ireland), and graduated in experimental physics at Queen's University, Belfast, in 1948.
This must be satisfied by any local hidden variable theory (additional info and facts about local hidden variable theory) but can be violated under quantum mechanics (The branch of quantum physics that accounts for matter at the atomic level; an extension of statistical mechanics based on quantum theory (especially the Pauli exclusion principle)).
www.absoluteastronomy.com /encyclopedia/j/jo/john_stewart_bell.htm   (781 words)

  
 Archive of Astronomy Questions and Answers   (Site not responding. Last check: 2007-11-07)
In 1932, the great mathematician John von Neumann wrote a highly influential book on Quantum Mechanics in which this theory was treated as a purely mathematical theory as though it were a branch of mathematics.
John Bell had always been intrigued and even a bit obsessed by the foundations of quantum theory, von Neumann's work, and the so-called Einstein-Podolsky-Rosen experiment, and he took this new opportunity to investigate this hazy area in physics.
John Bell discovered that, in order for Bohm's hidden-variable theory to work, it would have to be very badly 'non-local' meaning that it would have to allow for information to travel faster then the speed of light.
www.astronomycafe.net /qadir/q514.html   (712 words)

  
 The Winchester Star-The Good Scout   (Site not responding. Last check: 2007-11-07)
Bell was honored on Thursday night at the Berryville Avenue Hampton Inn in Winchester for his dedication to Scouting.
When Bell was mayor of Winchester from 1972 to 1980, he put in quite a few hours as the counselor for the Citizenship in the Community Merit Badge.
Bell was described by Michael M. Foreman, the evening’s master of ceremonies, as a historian, scholar, public servant, lay theologian, horticulturist, patron of the arts, philanthropist, teacher, “gentleman, and gentle man.”
www.winchesterstar.com /TheWinchesterStar/000331/story_bell.asp   (669 words)

  
 Martha Stewart in court for appeal hearing - The New Martha - MSNBC.com
Stewart was convicted of obstructing justice and lying to the government about her 2001 sale of nearly 4,000 shares of the biotechnology company ImClone Systems Inc., run by her longtime friend Sam Waksal.
Stewart’s lawyers claim her trial was tainted by improper insinuations by prosecutors that she was charged with insider trading.
Stewart’s lawyers said the sale was based on a prearranged agreement with her stockbroker to sell once the stock dropped to $60 per share.
msnbc.msn.com /id/7219340   (880 words)

  
 American Scientist Online - John Bell Across Space and Time   (Site not responding. Last check: 2007-11-07)
John Stewart Bell (1928–1990) was one of the leading physicists of the 20th century, a deep and serious thinker.
Bell emphasized that the empirical facts of quantum physics do not at all force us to renounce realism: There is a realist theory that accounts for all of these facts in a most elegant way—Bohmian mechanics (also known as de Broglie–Bohm theory).
The cross section is biased, though, because researchers working on Bohmian mechanics, of which Bell was the leading proponent during the decades before his death, were simply not invited to the conference, and realists are in the minority among the authors.
www.americanscientist.org /template/BookReviewTypeDetail/assetid/25825   (1047 words)

  
 John Q. Stewart Papers
John Quincy Stewart was born on 10 September 1894, in Harrisburg, Pennsylvania, to John Q. and Mary (Liebendorfer) Stewart.
Stewart was a prolific writer of articles documenting his investigations in the areas of astronomy, astrophysics, cartography, demography, demography in relation to geography, gyromagnetic effect, hurricanes, ionized gases, lunar craters, meteorology, navigational methods, philosophy of science, physics, sociology, solar eclipses, space travel, speech and hearing, stellar atmospheres, sunspots, and weather cycles.
Their son, John Westcott Stewart, was born 15 November 1926, and followed his father's path to become an associate professor of physics at the University of Virginia.
libweb.princeton.edu /libraries/firestone/rbsc/aids/stewart-john.html   (2356 words)

  
 Bells Theorem
Bell was able to show that an ordinary model of reality as well as a contextual model, has to be non-local (spaceless).
Bell's theorem argues that in any reality of this sort (ordinary matter), information could not travel fast enough to explain the quantum facts.
Bell states that a faster than light communication for ordinary states is a necessity to explain quantum facts.
home.infionline.net /~jforberg/id17.html   (769 words)

  
 CNN.com - Transcripts
STEWART: You know, the interesting thing I have is, you have a responsibility to the public discourse, and you fail miserably.
STEWART: The only way it would be harder is if his administration is less absurd than this one.
STEWART: In terms of absurdity and their world matching up to the one that -- you know, it was interesting.
transcripts.cnn.com /TRANSCRIPTS/0410/15/cf.01.html   (3729 words)

  
 Katma Tui
John Stewart's first few days were successful as Green Lantern, but a mishap during the rescue of the space shuttle Champion caused Stewart to seriously doubt his effectiveness.
Stewart was fired from his job as architect at Ferris Aircraft.
The move puzzled Stewart and Katma was forced to cover Jordan's identity by claiming she had sought to pay Ferris back for unfairly firing Stewart as an architect.
www.glcorps.org /katma.html   (3959 words)

  
 Queen's honours Belfast scientist   (Site not responding. Last check: 2007-11-07)
Bell became a Fellow of the Royal Society in 1972, and although he received many awards, it took some time before his exceptional achievements were fully realised.
The blue plaque commemorating Bell’s pioneering work and contribution to science will be unveiled at 12 noon at the Department of Pure and Applied Physics by John Bell’s widow, Dr Mary Bell.
Born in Belfast in 1928 John Stewart Bell studied Physics at Queen’s from 1945 to 1949 and worked in Harwell in England and later the European Centre for Nuclear Research (CERN) in Geneva, where he died in 1990.
www.qub.ac.uk /info/press/20020507_100437.html   (417 words)

  
 Amazon.ca: Cold Terror: How Canada Nurtures and Exports Terrorism to the World: Books   (Site not responding. Last check: 2007-11-07)
Bell assures readers that he is not opposed to immigration, yet early in the book he cites favourably the report of a Washington, D.C.-based organization called the Center for Immigration Studies.
Stewart Bell, a seasoned journalist who has written on terrorism for a dozen years, has been criticized for allegedly targeting minority ethnic groups.
Stewart Bell, a seasoned journalist who has written on terrorism for several years, has been criticized for allegedly targeting minority ethnic groups.
www.amazon.ca /exec/obidos/ASIN/0470834633   (1156 words)

  
 JOHN BELL HOOD   (Site not responding. Last check: 2007-11-07)
John Bell Hood, born in Owingsville, Kentucky, June 1, 1831, and graduated from West Point in the class of 1853 had by all odds the most spectacular advance in rank of any officer in the Confederate service.
After being severely wounded in the arm at Gettysburg where his troop performed superbly and after losing a leg at Chickamauga, he was appointed lieutenant general on February 1, 1964, to rank from September 20, 1863, and assigned to a corps under Joseph E Johnston whom he ultimately superseded.
Hoods corps was composed of the divisions of Hindman, C L Stevenson, and A P Stewart, Army of Tennessee.
www.b17.com /mosb/generals/hood.htm   (348 words)

  
 MonkeyFilter | Curious George: Who is John Stewart?
John Stewart is a distinguished singer, songwriter, and guitarist.
John Stewart is a Muesli-Eating Super Monkey with a battle rating of 6.3.
And Jon Stewart is the illegitimate child of Martha and Jimmy Stewart...
monkeyfilter.com /link.php/5316   (1387 words)

  
 Bell's Theorem
Bell's Theorem (Reality must be non-local) is remarkable for several reasons: 1) it is a mathematical proof, not a conjecture or speculation; 2) it is a proof about Reality not Appearances.
For a good account of Bell's life and deeper quantum issues see Jeremy Bernstein's excellent account composed from interviews with Bell shortly before his death.
Goldberger, Horne and Zeilinger (GHZ) generalized the two-particle EPR experiment to three or more particles and came up with what is probably the most elegant proof (using only eigenstates: quantum theory's deterministic subset) of nature's necessary non-locality.
members.cruzio.com /~quanta/bell.html   (469 words)

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