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Cambridge University Press eBooks

Introduction

Sandro Petruccioli

Published Nov 18, 1993• 0 citations
Publisher

Abstract

‘Quantum mechanics is very impressive. But an inner voice tells me that it is not yet the real thing. The theory produces a good deal but hardly brings us closer to the secret of the Old One’. These views were contained in a letter written by Albert Einstein to Max Born in December 1926. Though the following year would see the completion of work on the theoretical foundation of the modern physics of atoms and particles, Einstein was never to change his judgement and remained firmly convinced that ‘this business […] contains some unreasonableness’. He was unwilling to sacrifice his own ideas as to the cognitive scope of science even in the face of the important results being achieved by the new theory. To the undeterministic findings of quantum mechanics he opposed his belief in the ‘possibility of giving a model of reality, a theory, that is to say, which shall represent events themselves and not merely the probability of their occurrence’. For this reason he chose to live with the isolation of his scepticism and dissent, ironically accepting the reputation as a obstinate heretic that he had won over the years among his colleagues, and worked to the end on his own research programme to develop a unified field theory of rigorously causal nature. As is generally known, Einstein carried on a strong scientific and philosophical dispute with the defenders of the so-called official interpretation of quantum mechanics.

DOI
10.1017/cbo9780511600029.001

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Translated by Irene Born Newton-John; closing comment by Max Born. 1 1. M. Born, The Born—Einstein Letters 1916-1955: Friendship, Politics and Physics in Uncertain Times, Macmillan, New York (2005), p. 79. Letter © Hebrew University of Jerusalem. This letter antedates by a year or two the “new” quantum mechanics of Werner Heisenberg, Max Born, Pasqual Jordan, and Erwin Schrödinger. Einstein begins with a response to a letter about Japan by Born’s wife, Hedi—a letter that has since been lost. But then, as he would for the next 30 years, Einstein launches into his differences with Max on the interpretation of quantum phenomena. If atomic phenomena are truly random, he grumbles, he’d rather be a croupier. Berlin, 29 April 1924Dear Borns,Your letter, dear Mrs. Born, was really excellent. Indeed, what causes the sense of well-being inspired by Japanese society and art is that the individual is so harmoniously integrated into his wider environment that he derives his experiences not from the self, but mainly from the community. Each of us longed for this when we were young, but we had to resign ourselves to its impossibility. For, of all the communities available to us there is not one I would want to devote myself to, except for the society of the true searchers, which has very few living members at any time.… Bohr’s opinion about radiation is of great interest. But I should not want to be forced into abandoning strict causality without defending it more strongly than I have so far. I find the idea quite intolerable that an electron exposed to radiation should choose, of its own free will, not only its moment to jump off, but also its direction. In that case, I would rather be a cobbler, or even an employee in a gaming house, than a physicist. Certainly my attempts to give tangible form to the quanta have foundered again and again, but I am far from giving up hope. And even if it never works, there is always that consolation that this lack of success is entirely mine. … With best wishes.YoursEinstein… Your pretty remark [Mrs. Born, about subject unknown] makes me want to stroke your head, if that is at all permissible in the case of a married lady. Max Born’s 1969 comments:’ The letter from my wife to which Einstein replied is missing. The basic reason for the dispute between [Einstein and me] on the validity of statistical laws was as follows: Einstein was firmly convinced that physics can supply us with knowledge of the objectively existing world. Together with many other physicists, I have been gradually converted, as a result of experiences in the field of atomic quantum phenomena, to the point of view that this is not so. At any given moment, our knowledge of the objective world is only a crude approximation from which, by applying certain rules such as the probability laws of quantum mechanics, we can predict unknown (e.g. future) conditions. REFERENCESection:ChooseTop of pageREFERENCE <<1. M. Born, The Born—Einstein Letters 1916-1955: Friendship, Politics and Physics in Uncertain Times, Macmillan, New York (2005), p. 79. Letter © Hebrew University of Jerusalem. Google Scholar© 2005 American Institute of Physics.

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‘Quantum mechanics is very impressive. But an inner voice tells me that it is not yet the real thing. The theory produces a good deal but hardly brings us closer to the secret of the Old One’. These views were contained in a letter written by Albert Einstein to Max Born in December 1926. Though the following year would see the completion of work on the theoretical foundation of the modern physics of atoms and particles, Einstein was never to change his judgement and remained firmly convinced that ‘this business […] contains some unreasonableness’. He was unwilling to sacrifice his own ideas as to the cognitive scope of science even in the face of the important results being achieved by the new theory. To the undeterministic findings of quantum mechanics he opposed his belief in the ‘possibility of giving a model of reality, a theory, that is to say, which shall represent events themselves and not merely the probability of their occurrence’. For this reason he chose to live with the isolation of his scepticism and dissent, ironically accepting the reputation as a obstinate heretic that he had won over the years among his colleagues, and worked to the end on his own research programme to develop a unified field theory of rigorously causal nature. As is generally known, Einstein carried on a strong scientific and philosophical dispute with the defenders of the so-called official interpretation of quantum mechanics.
The difficulties of the old quantum theory were largely dispelled by the development of quantum mechanics in the 1920s. First Heisenberg (1925) developed the rather abstract matrix mechanics and soon after Schro¨dinger (1926; see also Eckart, 1926) developed the physically more appealing wave mechanics. Subsequently he showed them to be mathematically equivalent. The physicists were greatly relieved; now they had once again a mathematical formalism that enabled the results of experiments to be calculated. It was possible to move forward. It is certainly a very elegant and indeed beautiful formalism, and does enable the results of many physical measurements to be calculated with great accuracy. It is used daily by atomic and nuclear physicists; there is no other way to make calculations. From the earliest days there has been intense debate about the interpretation of quantum mechanics, and it shows no signs of being settled; if anything it is becoming more intense over the years. As Penrose has remarked, no one understands quantum mechanics. Feynman (1967; see also Sykes, 1994) also admitted that ‘nobody understands quantum mechanics’, and Einstein once remarked: ‘I have thought a hundred times as much about the quantum problems as I have about general relativity theory’ (Pais, 1994, p. 57). It should therefore be evident that the most that can be done here is to try to show where the real difficulties lie, and how the failure to recognize that quantum mechanics is an essentially statistical theory has led to a series of confusing quantum paradoxes. It is just these paradoxes that have often been used to support theological speculations. It is useful to ask what ‘understanding quantum mechanics’ actually means. Certainly it means being able to calculate the results of many measurements. The same applies to Newton’s theory of gravitation, which we understand in the sense that we can use it as a basis of calculation, although we do not really understand the gravitational force itself. Very often, especially in modern physics, the mathematical formalism does not give us the sort of intuitive physical feeling for what is going on that we often obtain from classical mechanics. Perhaps we can never achieve more than this for quantum mechanics. In classical mechanics we can assume that a property that is measured objectively exists prior to the interaction of the measuring apparatus with the observed system. Quantum mechanics, however, ‘is incompatible with the proposition that measurement discovers some unknown but pre-existing property’ (Peres, 1997, p. 14). There is an important distinction between mysteries and absurdities. We may be forced to live with mysteries, but there is no reason why we should put up with absurdities such as the wave-particle duality, tunnelling through potential barriers, acausal events and the collapse of the wave function. These are the quantum paradoxes that will be discussed later on. They arise within the Copenhagen interpretation of quantum mechanics and are solved by other interpretations. These alternative interpretations enable us to make conjectures about what is going on, even though we cannot understand it in detail. This is acceptable and a stimulus to further research. It is certainly difficult enough to understand quantum mechanics, but there is no need to try to visualize logical absurdities in the effort to do so. Quantum mechanics is a mathematical formalism that makes it possible to calculate the results of some experiments. Anything more than this, such as questions about the interpretation of what is measured and whether it tells us what is actually going on in the system being studied, belongs to philosophy. Thus we are concerned here with what is essentially a philosophical debate; if it were just a matter of physics the debate would have been settled long ago. One of the difficulties is that it invokes the results of experiments and uses the language of quantum mechanics. Inevitably this language uses philosophical terms and then it is easy to give the impression that the philosophical propositions are in some way entailed by the physical results. These in turn can influence theological thinking. In order to be quite clear which arguments are justified and which are not, it is essential to separate the three levels of discourse: physical, philosophical and theological. Our task is to relate these together, and this immediately raises the traditional problems of the philosophy of science, including the relation of experiment to theory, and of theory to explanation. We begin by discussing experiments, distinguishing between those that are real and those that are imaginary.
Quantum theory is considered as the most successful scientific theory of all time. However, the understanding1 and interpretation of quantum theory has been subjected to a continuous debate since its formulation. A leading role was played by Einstein in the development of the old quantum theory but he was not impressed by the statistical interpretation of the quantum theory. He believed in a world of well defined law and order in which objectivity exists. He never thought that the new quantum theory as a complete theory. In 1926 in a letter to Max Born, Einstein wrote: Quantum mechanics is very impressive. ... The theory produces good deal but hardly brings us closer to the secret of the old one. I am at all events convinced that God does not play dice.
Quantum mechanics is our most successful physical theory. It underlies our very detailed understanding of atomic physics, chemistry, and nuclear physics, and the many technologies to which physical systems in these regimes give rise. Additionally, relativistic quantum mechanics is the basis for the standard model of elementary particles, which very successfully gives a partial unification of the forces operating at the atomic, nuclear, and subnuclear levels. However, from its inception the probabilistic nature of quantum mechanics, and the fact that “quantum measurements” in the orthodox formulation appear to require the intervention of non-quantum mechanical “classical systems,” have led to speculations by many physicists, mathematicians, and philosophers of science that quantum mechanics may be incomplete. Among the Founding Fathers of quantum theory, Einstein and Schrödinger were both of the opinion that quantum mechanics is in some way unsatisfactory, and this view has been amplified in more recent profound work of John Bell, among others. In an opposing camp, many others in the physics, mathematics, and philosophy communities have attempted to provide an interpretational foundation in which quantum mechanics remains a complete and self-contained system. Among the Founding Fathers, Bohr, Born, and Heisenberg maintained that quantum mechanics is a complete system, and a number of recent proposals have been made to improve upon or to provide alternatives to their “Copenhagen Interpretation.” The debate continues, and has spawned an enormous literature.
Translated by Irene Born Newton-John; closing comment by Max Born. 1 1. M. Born, The Born—Einstein Letters 1916-1955: Friendship, Politics and Physics in Uncertain Times, Macmillan, New York (2005), p. 79. Letter © Hebrew University of Jerusalem. This letter antedates by a year or two the “new” quantum mechanics of Werner Heisenberg, Max Born, Pasqual Jordan, and Erwin Schrödinger. Einstein begins with a response to a letter about Japan by Born’s wife, Hedi—a letter that has since been lost. But then, as he would for the next 30 years, Einstein launches into his differences with Max on the interpretation of quantum phenomena. If atomic phenomena are truly random, he grumbles, he’d rather be a croupier. Berlin, 29 April 1924Dear Borns,Your letter, dear Mrs. Born, was really excellent. Indeed, what causes the sense of well-being inspired by Japanese society and art is that the individual is so harmoniously integrated into his wider environment that he derives his experiences not from the self, but mainly from the community. Each of us longed for this when we were young, but we had to resign ourselves to its impossibility. For, of all the communities available to us there is not one I would want to devote myself to, except for the society of the true searchers, which has very few living members at any time.… Bohr’s opinion about radiation is of great interest. But I should not want to be forced into abandoning strict causality without defending it more strongly than I have so far. I find the idea quite intolerable that an electron exposed to radiation should choose, of its own free will, not only its moment to jump off, but also its direction. In that case, I would rather be a cobbler, or even an employee in a gaming house, than a physicist. Certainly my attempts to give tangible form to the quanta have foundered again and again, but I am far from giving up hope. And even if it never works, there is always that consolation that this lack of success is entirely mine. … With best wishes.YoursEinstein… Your pretty remark [Mrs. Born, about subject unknown] makes me want to stroke your head, if that is at all permissible in the case of a married lady. Max Born’s 1969 comments:’ The letter from my wife to which Einstein replied is missing. The basic reason for the dispute between [Einstein and me] on the validity of statistical laws was as follows: Einstein was firmly convinced that physics can supply us with knowledge of the objectively existing world. Together with many other physicists, I have been gradually converted, as a result of experiences in the field of atomic quantum phenomena, to the point of view that this is not so. At any given moment, our knowledge of the objective world is only a crude approximation from which, by applying certain rules such as the probability laws of quantum mechanics, we can predict unknown (e.g. future) conditions. REFERENCESection:ChooseTop of pageREFERENCE <<1. M. Born, The Born—Einstein Letters 1916-1955: Friendship, Politics and Physics in Uncertain Times, Macmillan, New York (2005), p. 79. Letter © Hebrew University of Jerusalem. Google Scholar© 2005 American Institute of Physics.
Those defile the purity of mathematical and philosophical truthy who confound real quantities with their relations and sensible measures. —ISAAC NEWTON, Principia Before we say anything about quantum mechanics, let us take a quick look at the Newtonian (or ‘classical’) view of the physical universe. According to that view, nature consists of an enormous number of particles. When Newtonian physics is combined with the theory of the electromagnetic field, it becomes convenient to think of these particles as dimensionless (even if there is a kind of conceptual strain involved in trying to think of something as having a mass but not any size ), and as possessing electrical properties – negative charge, or positive charge, or neutrality. This leads to the well-known ‘solar system’ view of the atom – with the electrons whirling around the nucleons (neutrons and protons) just as the planets whirl around the sun. Out of atoms are built molecules; out of molecules, macroscopic objects, scaling from dust motes to whole planets and stars. These latter also fall into larger groupings – solar systems and galaxies – but these larger structures differ from the ones previously mentioned in being held together exclusively by gravitational forces. At every level, however, one has trajectories (ultimately that means the possibility of continuously tracing the movements of the elementary particles) and one has causality (ultimately that means the possibility of extrapolating from the history of the universe up to a given time to its whole sequence of future states).
One critic of Quantum Physics was, reportedly, Albert Einstein, to whom this quote is ascribed: “Quantum mechanics is certainly imposing. But an inner voice tells me that it is not yet the real thing. The theory says a lot, but does not really bring us any closer to the secret of the 'old one'. I, at any rate, am convinced that He does not throw dice”. In this booklet, criticisms towards some claims of some Nobel Prize Laureates in Physics, such as Max Planck, Louis de Broglie, Erwin Schrodinger, Max Born, Werner Heisenberg, Paul Dirac, Richard Feynman, Gerardus 't Hooft, are explained with detailed math.'s physical descriptions as to where these famous physicists were wrong. In Chapter 1 of this booklet it is shown that Maxwell's equations and Classic Physics, can explain some of the phenomena such as the Photoelectric Effect satisfyingly. In Chapter 2 it is explained that, though well encouraging, still taking the Nobel Prizes' money would be unethical and immoral, since that money was initially earned by the sale of dynamite which was also used, unfortunately, for killings. Justice would have been if that money would have been given to its victims or to their surviving families.