Book contents
- Frontmatter
- Contents
- List of contributors
- Preface
- 1 Introduction
- 2 Boltzmann's influence on Schrödinger
- 3 Schrödinger's original interpretation of the Schrödinger equation: a rescue attempt
- 4 Are there quantum jumps?
- 5 Square root of minus one, complex phases and Erwin Schrödinger
- 6 Consequences of the Schrödinger equation for atomic and molecular physics
- 7 Molecular dynamics: from H+H2 to biomolecules
- 8 Orbital presentation of chemical reactions
- 9 Quantum chemistry
- 10 Eamon de Valera, Erwin Schrödinger and the Dublin Institute
- 11 Do bosons condense?
- 12 Schrödinger's nonlinear optics
- 13 Schrödinger's unified field theory seen 40 years later
- 14 The Schrödinger equation of the Universe
- 15 Overview of particle physics
- 16 Gauge fields, topological defects and cosmology
- 17 Quantum theory and astronomy
- 18 Schrödinger's contributions to chemistry and biology
- 19 Erwin Schrödinger's What is Life? and molecular biology
- Index
4 - Are there quantum jumps?
Published online by Cambridge University Press: 19 January 2010
- Frontmatter
- Contents
- List of contributors
- Preface
- 1 Introduction
- 2 Boltzmann's influence on Schrödinger
- 3 Schrödinger's original interpretation of the Schrödinger equation: a rescue attempt
- 4 Are there quantum jumps?
- 5 Square root of minus one, complex phases and Erwin Schrödinger
- 6 Consequences of the Schrödinger equation for atomic and molecular physics
- 7 Molecular dynamics: from H+H2 to biomolecules
- 8 Orbital presentation of chemical reactions
- 9 Quantum chemistry
- 10 Eamon de Valera, Erwin Schrödinger and the Dublin Institute
- 11 Do bosons condense?
- 12 Schrödinger's nonlinear optics
- 13 Schrödinger's unified field theory seen 40 years later
- 14 The Schrödinger equation of the Universe
- 15 Overview of particle physics
- 16 Gauge fields, topological defects and cosmology
- 17 Quantum theory and astronomy
- 18 Schrödinger's contributions to chemistry and biology
- 19 Erwin Schrödinger's What is Life? and molecular biology
- Index
Summary
If we have to go on with these damned quantum jumps, then I'm sorry that I ever got involved.
E. SchrödingerIntroduction
I have borrowed the title of a characteristic paper by Schrödinger (Schrödinger, 1952). In it he contrasts the smooth evolution of the Schrödinger wavefunction with the erratic behaviour of the picture by which the wavefunction is usually supplemented, or ‘interpreted’, in the minds of most physicists. He objects in particular to the notion of ‘stationary states’, and above all to ‘quantum jumping’ between those states. He regards these concepts as hangovers from the old Bohr quantum theory, of 1913, and entirely unmotivated by anything in the mathematics of the new theory of 1926. He would like to regard the wavefunction itself as the complete picture, and completely determined by the Schrödinger equation, and so evolving smoothly without ‘quantum jumps’. Nor would he have ‘particles’ in the picture. At an early stage, he had tried to replace ‘particles’ by wavepackets (Schrödinger, 1926). But wavepackets diffuse. And the paper of 1952 ends, rather lamely, with the admission that Schrödinger does not see how, for the present, to account for particle tracks in track chambers… nor, more generally, for the definiteness, the particularity, of the world of experience, as compared with the indefiniteness, the waviness, of the wavefunction. It is the problem that he had had (Schrödinger, 1935a) with his cat. He thought that she could not be both dead and alive.
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- Information
- SchrödingerCentenary Celebration of a Polymath, pp. 41 - 52Publisher: Cambridge University PressPrint publication year: 1987
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