„To know the quantum mechanical state of a system implies, in general, only statistical restrictions on the results of measurements. It seems interesting to ask if this statistical element be thought of as arising, as in classical statistical mechanics, because the states in question are averages over better defined states for which individually the results would be quite determined. These hypothetical 'dispersion free' states would be specified not only by the quantum mechanical state vector but also by additional 'hidden variables' - 'hidden' because if states with prescribed values of these variables could actually be prepared, quantum mechanics would be observably inadequate.“

On the problem of hidden variables in quantum mechanics (1966)

Obtido da Wikiquote. Última atualização 3 de Junho de 2021. História
John Stewart Bell photo
John Stewart Bell
1928 - 1990

Citações relacionadas

Gerardus 't Hooft photo

„This is used by some to state that no additional interpretation prescriptions for quantum mechanics are necessary. Yet we insist that the axioms for any "complete" quantum theory for the entire cosmos would present us with as yet unresolved paradoxes.“

—  Gerardus 't Hooft Dutch theoretical physicist and Nobel Prize winner 1946

Contexto: The usual no-go theorems telling us that hidden variables are irreconcilable with locality, appear to start with fairly conventional pictures of particle systems, detectors, space and time. Usually, it is taken for granted that events at one place in the universe can be described independently from what happens elsewhere. Perhaps one has to search for descriptions where the situation is more complex. Maybe, it needs not be half as complex as superstring theory itself. The conventional Copenhagen interpretation of quantum mechanics suffices to answer all practical questions concerning conventional experiments with quantum mechanics, and the outcome of experiments such as that of Aspect et al can be precisely predicted by conventional quantum mechanics. This is used by some to state that no additional interpretation prescriptions for quantum mechanics are necessary. Yet we insist that the axioms for any "complete" quantum theory for the entire cosmos would present us with as yet unresolved paradoxes.

Obstacles on the Way toward the Quantization of Space, Time and Matter — and possible resolutions — http://www.staff.science.uu.nl/~hooft101/gthpub/foundations.pdf

Sidney Coleman photo

„People get a lot of confusion, because they keep trying to think of quantum mechanics as classical mechanics“

—  Sidney Coleman American physicist 1937 - 2007

Quantum Mechanics in Your Face http://www.physics.harvard.edu/about/video.html, a lecture given by Sidney Coleman at the New England sectional meeting of the American Physical Society (Apr. 9, 1994)

Peter Woit photo
Luboš Motl photo
Luboš Motl photo

„The actual heart of quantum mechanics is that the objects in its equations are connected to the observations very differently than the classical counterparts have been.“

—  Luboš Motl Czech physicist and translator 1973

https://motls.blogspot.com/2018/09/why-string-theory-is-quantum-mechanics.html
The Reference Frame http://motls.blogspot.com/

Alain Aspect photo
George Klir photo
Steven Weinberg photo

„It's kind of interesting to show that the strange features of quantum mechanics are actually observed. We still don't totally understand what it means.“

—  Leonard Mandel German physicist 1927 - 2001

as quoted by James Glanz, in Leonard Mandel, 73, Revealer Of Light's Weirdness, Is Dead http://www.nytimes.com/2001/02/13/nyregion/leonard-mandel-73-revealer-of-light-s-weirdness-is-dead.html?sec=&spon=, New York Times (Tuesday, February 13, 2001)

Erwin Schrödinger photo
Jan Zaanen photo

„Quantum mechanics is the Disney World for adults!“

—  Jan Zaanen Dutch physicist 1957

Real men do GR!
in Eminent Talent: 2006 - The twelfth year, a festive edition celebrating 10 years Spinoza Prize. http://www.nwo.nl/nwohome.nsf/pages/NWOA_6WAGZJ_Eng
Original: (nl) Quantummechanica is de Efteling voor volwassenen!

Gerardus 't Hooft photo

„Quantum mechanics as it stands would be perfect if we didn't have the quantum-gravity issue and a few other very deep fundamental problems.“

—  Gerardus 't Hooft Dutch theoretical physicist and Nobel Prize winner 1946

Does Some Deeper Level of Physics Underlie Quantum Mechanics? An Interview with Nobelist Gerard 't Hooft http://blogs.scientificamerican.com/critical-opalescence/2013/10/07/does-some-deeper-level-of-physics-underlie-quantum-mechanics-an-interview-with-nobelist-gerard-t-hooft/

David Bohm photo
John S. Bell photo

„Theoretical physicists live in a classical world, looking out into a quantum-mechanical world. The latter we describe only subjectively, in terms of procedures and results in our classical domain.“

—  John S. Bell, Introduction to the hidden-variable question

"Introduction to the hidden-variable question" (1971), included in Speakable and Unspeakable in Quantum Mechanics (1987), p. 29

Paul Dirac photo

„It seems clear that the present quantum mechanics is not in its final form.“

—  Paul Dirac theoretical physicist 1902 - 1984

"The Early Years of Relativity" in Albert Einstein : Historical and Cultural Perspectives : The Centennial Symposium in Jerusalem (1979) edited by Gerald James Holton and Yehuda Elkana, p. 85
Contexto: It seems clear that the present quantum mechanics is not in its final form. Some further changes will be needed, just about as drastic as the changes made in passing from Bohr's orbit theory to quantum mechanics. Some day a new quantum mechanics, a relativistic one, will be discovered, in which we will not have these infinities occurring at all. It might very well be that the new quantum mechanics will have determinism in the way that Einstein wanted.

Sean Carroll photo

„In contrast to the arbitrarily complicated evolution of a (nonintegrable) classical system, all a quantum state ever does is move in circles.“

—  Sean Carroll American theoretical cosmologist 1966

FQXi Prize winning essay What if Time Really Exists? http://fqxi.org/community/forum/topic/318, 2008.

Tópicos relacionados