182 research outputs found
Albert Einstein's 1916 Review Article on General Relativity
The first comprehensive overview of the final version of the general theory
of relativity was published by Einstein in 1916 after several expositions of
preliminary versions and latest revisions of the theory in November 1915. A
historical account of this review paper is given, of its prehistory, including
a discussion of Einstein's collaboration with Marcel Grossmann, and of its
immediate reception.Comment: 27 pages, 1 jpg imag
Remarks on the Origin of Path Integration: Einstein and Feynman
I offer some historical comments about the origins of Feynman's path integral
approach, as an alternative approach to standard quantum mechanics. Looking at
the interaction between Einstein and Feynman, which was mediated by Feynman's
thesis supervisor John Wheeler, it is argued that, contrary to what one might
expect, the significance of the interaction between Einstein and Feynman
pertained to a critique of classical field theory, rather than to a direct
critique of quantum mechanics itself. Nevertheless, the critical perspective on
classical field theory became a motivation and point of departure for Feynman's
space-time approach to non-relativistic quantum mechanics.Comment: To appear in Proceedings of 'Path Integrals - New Trends and
Perspectives,' Dresden, 23-28 September 200
Quantum Theory at the Crossroads: Reconsidering the 1927 Solvay Conference [Book Review]
Can the reassessment of a historical debate contribute to the better understanding of an open philosophical question? The editors of this volume say that it can. The open question concerns the interpretation of quantum mechanics. The historical debate under review is the famous 1927 Solvay conference in Brussels. According to the received view, the standard Copenhagen interpretation was established as the canonical understanding of the new concepts brought about by quantum mechanics during that conference. The conference is remembered, above all, for the famous debate between Bohr and Einstein about the limits and understanding of the quantum uncertainty relations. Again and again, the received view has it, Einstein would come up with ideas for an experiment proving the inconsistency or incompleteness of the new quantum theoretical concepts. And again and again, Bohr would come up with a refutation of Einstein's challenge, proving the Copenhagen interpretation to be consistent and inevitable. But we really know about that debate between Einstein and Bohr only from the latter's own account, published some twenty years later in Paul Arthur Schilpp's Albert Einstein: Philosopher‐Scientist (Open Court, 1949). Contemporary accounts, most importantly a famous letter by Ehrenfest, are less explicit and more equivocal about the debate between Bohr and Einstein
Marcel Grossmann and his contribution to the general theory of relativity
This article reviews the biography of the Swiss mathematician Marcel
Grossmann (1878-1936) and his contributions to the emergence of the general
theory of relativity. The first part is his biography, while the second part
reviews his collaboration with Einstein in Zurich which resulted in the
Einstein-Grossmann theory of 1913. This theory is a precursor version of the
final theory of general relativity with all the ingredients of that theory
except for the correct gravitational field equations. Their collaboration is
analyzed in some detail with a focus on the question of exactly what role
Grossmann played in it.Comment: 52pp, 7 figs, to appear in Proceedings of 13th Marcel Grossmann
meeting; revised version with some minor stylistic emendation
A Look Back at the Ehrenfest Classification. Translation and Commentary of Ehrenfest's 1933 paper introducing the notion of phase transitions of different order
A translation of Paul Ehrenfest's 1933 paper, entitled "Phase transitions in
the usual and generalized sense, classified according to the singularities of
the thermodynamic potential" is presented. Some historical commentary about the
paper's context is also given.Comment: 13p
Hilbert's 'World Equations' and His Vision of a Unified Science
In summer 1923, a year after his lectures on the `New Foundation of
Mathematics' and half a year before the republication of his two notes on the
`Foundations of Physics,' Hilbert delivered a trilogy of lectures in Hamburg.
In these lectures, Hilbert expounds in an unusually explicit manner his
epistemological perspective on science as a subdiscipline of an all embracing
science of mathematics. The starting point of Hilbert's considerations is the
claim that the class of gravitational and electromagnetic field equations
implied by his original variational formulation of 1915 provides valid
candidate `world equations,' even in view of attempts at unified field theories
\'a la Weyl and Eddington based on the concept of the affine connection. We
give a discussion of Hilbert's lectures and, in particular, examine his claim
that Einstein in his 1923 papers on affine unified field theory only arrived at
Hilbert's original 1915 theory. We also briefly comment on Hilbert's
philosophical viewpoints expressed in these lectures.Comment: 23 pages; to appear in Einstein Studie
Computer Simulations of Quantum Chains
We report recent progress in computer simulations of quantum systems
described in the path-integral formulation. For the example of the
quantum chain we show that the accuracy of the simulation may greatly be
enhanced by a combination of multigrid update techniques with a refined
discretization scheme. This allows us to assess the accuracy of a variational
approximation.Comment: 5 pages, LaTeX + 2 postscript figures. Talk presented by TS at "Path
Integrals from meV to MeV: Dubna '96". See also
http://www.cond-mat.physik.uni-mainz.de/~janke/doc/home_janke.htm
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