By Pieter E. Vermaas

ISBN-10: 0521675677

ISBN-13: 9780521675673

Modal interpretations offer a basic framework in which quantum mechanics should be regarded as a idea that describes fact by way of actual structures owning certain homes. Modal interpretations are quite new makes an attempt to give quantum mechanics as a thought which, like different actual theories, describes an observer-independent fact. during this e-book, Pieter Vermaas info the result of this paintings. He offers either an available survey and a scientific reference paintings approximately find out how to comprehend quantum mechanics utilizing a modal interpretation. The publication might be of significant worth to undergraduates, graduate scholars and researchers in philosophy of technological know-how and physics departments with an curiosity in studying approximately modal interpretations of quantum mechanics.

**Read or Download A Philosopher's Understanding of Quantum Mechanics: Possibilities and Impossibilities of a Modal Interpretation PDF**

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**Extra info for A Philosopher's Understanding of Quantum Mechanics: Possibilities and Impossibilities of a Modal Interpretation**

**Sample text**

The third demand that a modal interpretation should yield a metaphysically tenable description of reality surpasses the first two demands because a fully developed and empirically adequate description of reality can still give a totally weird and unacceptable description of the properties of nonobserved quantum systems. 1 I argue that precisely because modal interpretations describe states of affairs which are in principle unobservable, one should be careful about discarding modal descriptions of reality as metaphysically untenable.

After this measurement, the state of the device /LL is still W^ = J2j \cj\2 lRy)(Ryl because one has rejected the projection postulate. Application of the eigenvalue-eigenstate link now yields in general that \i possesses the property E/l R ;)( R yl a n d not one of the individual pointer readings {|R^)(R^|};-. 9) has with probability \CJ\2 the outcome |Rp(R^| that corresponds to the eigenvalue a,j. This problem that interpretations sometimes fail to ascribe outcomes to measurement devices is the measurement problem for interpretations.

_/}_/ should be maps from all the projections in jtfa to the values {0,1}. The content of requirement (B) is, however, less clear because there is consensus neither about how to define the negation, conjunction and disjunction of properties in quantum mechanics nor about how to impose the logical relations. 1 I present my choice for the definitions of the negation, conjunction and disjunction. But assume here, for the sake of argument, that requirement (B) implies that the negation -i of a property represented by the projection Qa is represented by the projection and that the conjunction A and disjunction V of two properties represented 39 40 The different versions by two pair-wise commuting projections Q\ and Q^ are given, respectively, by 6 !

### A Philosopher's Understanding of Quantum Mechanics: Possibilities and Impossibilities of a Modal Interpretation by Pieter E. Vermaas

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