The British Journal for the Philosophy of Science Advance Access originally published online on September 9, 2005
The British Journal for the Philosophy of Science 2005 56(4):615-634; doi:10.1093/bjps/axi135
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A Philosopher Looks at Quantum Mechanics (Again)*
Department of Philosophy, Harvard University, Cambridge, MA 02138, USA hputnam{at}fas.harvard.edu
A Philosopher Looks at Quantum Mechanics (Putnam [1965]) explained why the interpretation of quantum mechanics is a philosophical problem in detail, but with only the necessary minimum of technicalities, in the hope of making the difficulties intelligible to as wide an audience as possible. When I wrote it, I had not seen Bell ([1964]), nor (of course) had I seen Ghirardi et al. ([1986]). And I did not discuss the Many Worlds interpretation. For all these reasons, I have decided to make a similar attempt forty years later, taking account of additional interpretations and of our knowledge concerning non-locality. (The Quantum Logical interpretation proposed in Putnam [1968] is not considered in the present paper, however, because Putnam [1994b] concluded that it was unworkable.) Rather than advocate a particular interpretation, this paper classifies the possible kinds of interpretation, subject only to the constraints of a very broadly construed scientific realism. Section 7 does, however, argue that two sorts of interpretationones according to which a collapse is brought about by the measurement (e.g. the traditional Copenhagen interpretation), and the Many Worlds interpretation or interpretationsshould be ruled out. The concluding section suggests some possible morals of a cosmological character.
- Background
- Scientific realism is the premise of my discussion
- What quantum mechanics saysand some problems
- Other interpretations of quantum mechanics
- The problem of Einstein's bed
- Classification of the possible kinds of interpretation
- Which interpretations I think we can rule out
- The moral of this discussion
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