“The two photons are entangled and according to local realism, their polarization planes should become independent… a typical EPR situation. Already in 1948, observations… agreed with quantum mechanics, not with local realism.”

— Richard Dalitz

R. H. Dalitz and F. J. Duarte, John Clive Ward, Physics Today 53, 99-100 (2000).

Adopted from Wikiquote. Last update June 3, 2021. History

Help us to complete the source, original and additional information

Do you have more details about the quote "The two photons are entangled and according to local realism, their polarization planes should become independent… a ty…" by Richard Dalitz?

Richard Dalitz 3

Australian physicist 1925–2006

Related quotes

“The two photons are entangled and according to local realism, their polarization planes should become independent… a typical EPR situation. Already in 1948, observations… agreed with quantum mechanics, not with local realism.”

F. J. Duarte (1954) Chilean-American physicist

R. H. Dalitz and F. J. Duarte, John Clive Ward, Physics Today 53, 99-100 (2000).

“Scientific realism in classical (i. e. pre-quantum) physics has remained compatible with the naive realism of everyday thinking on the whole; whereas it has proven impossible to find any consistent way to visualize the world underlying quantum theory in terms of our pictures in the everyday world. The general conclusion is that in quantum theory naive realism, although necessary at the level of observations, fails at the microscopic level.”

Ravi Gomatam (1950) Indian academic

R.Gomatam's paper Physics and Commonsense - Reassessing the connection in the light of the quantum theory http://arxiv.org/abs/0708.1536, 2004.

“The mechanical conception of the universe is nothing but naïve realism.”

Alfred Binet (1857–1911) French psychologist and inventor of the first usable intelligence test

Source: The Mind and the Brain, 1907, p. 38

“Offensive realism predicts that the United States will send its army across the Atlantic when there is a potential hegemon in Europe that the local great powers cannot contain by themselves.”

John Mearsheimer book The Tragedy of Great Power Politics

Source: The Tragedy of Great Power Politics (2001), Chapter 7, The Offshore Balancers, p. 252

“Although quantum theory involves the use of nonlocal states, such as wave packets and entangled states, there is nothing in the theory, or in the real world so far as it is accurately described by quantum theory, that corresponds to the sorts of instantaneous nonlocal influences which have often been thought to arise in the situation envisaged in the EPR paradox, or implied by the fact that quantum theory violates Bell inequalities.”

Robert Griffiths (physicist)

"Quantum Locality", Found Phys (2011) 41: 705–733

“In quantum physics, however, each observation implies an intervention in the observed. Because of the quantum physical laws of nature, a change of state of the observed is inevitably coupled to the observation process. So it's not a situation independent from the experiment that is observed, but we ourselves call forth the facts (or compel them to go in a certain direction to a disambiguation), that then become an observation.”

Pascual Jordan (1902–1980) German physicist and politician

In der Quantenphysik dagegen bedeutet jede Beobachtung einen Eingriff in das Beobachtete; eine Zustandsveränderung am Beobachteten ist auf Grund der quantenphysikalischen Naturgesetze mit dem Beobachtungsprozess zwangslaüfig verknüpft. Also nicht ein sowieso, unabhängig von diesem Experiment vorhandener Tatbestand wird wahrgenommen, sondern wir selber rufen die Tatbestände hervor (oder: nötigen sie in bestimmter Richtung zu einer Klärung), die dann zur Wahrnehmung gelangen.
Quantenmechanische Bemerkungen zur Biologie und Psychologie, Erkenntnis, Vol. 4 (1934). p. 228.

“The classical concept of 'physical entity', be it particle, wave, field or system, has become a problematic concept since the advent of relativity theory and quantum mechanics. The recent developments in modern quantum mechanics, with the performance of delicate and precise experiments involving single quantum entities, manifesting explicit non-local behavior for these entities, brings essential new information about the nature of the concept of entity.”

Diederik Aerts (1953) Belgian theoretical physicist

Aerts, D. (1998). " The entity and modern physics: the creation-discovery view of reality. http://www.vub.ac.be/CLEA/aerts/publications/1998EntModPhys.pdf" In E. Castellani (Ed.), Interpreting Bodies: Classical and Quantum Objects in Modern Physics (pp. 223-257). Princeton: Princeton University Press.

“Einstein had drawn attention to nonlocality in 1935 in an effort to show that quantum mechanics must be flawed. …Einstein proposed a thought experiment—now called the EPR experiment—involving two particles that spring from a common source and fly in opposite directions.
According to the standard model of quantum mechanics, neither particle has a definite position or momentum before it is measured; but by measuring the momentum of one particle, the physicist instantaneously forces the other particle to assume a fixed position… Deriding this effect as "spooky action at a distance," Einstein argued that it violated both common sense and his own theory of special relativity, which prohibits the propagation of effects faster than the speed of light; quantum mechanics must therefore be an incomplete theory. In 1980, however, a group of French physicists carried out a version of the EPR experiment and showed that it did indeed give rise to spooky action.”

John Horgan (journalist) (1953) American science journalist

The reason that the experiment does not violate special relativity is that one cannot exploit nonlocality to transmit information.
Source: The End of Science (1996), p. 83

“Science describes not just the observable world but also the world that lies beyond the appearances. This is a rough statement of realism with respect to science.”

Alan Chalmers book What Is This Thing Called Science?

Source: What Is This Thing Called Science? (Third Edition; 1999), Chapter 15, Realism and anti-realism, p. 226.

“I often told the fanatics of realism that there is no such thing as realism in art: it only exists in the mind of the observer. Art is a symbol, a thing conjuring up reality in our mental image. That is why I don't see any contradiction between abstract and figurative art either.”

Antoni Tàpies (1923–2012) Catalan painter, sculptor and art theorist

Source: undated quotes, Tàpies, Werke auf Papier 1943 – 2003,' (2004), p. 25.

“The two photons are entangled and according to local realism, their polarization planes should become independent… a typical EPR situation. Already in 1948, observations… agreed with quantum mechanics, not with local realism.”

Help us to complete the source, original and additional information

Richard Dalitz 3

Related quotes

Related topics