Quantum Mechanics

This second edition differs from the first edition mainly in the addition of a chapter on the Interpretational Problem. Even before the printing of the frrst edition, there was criticism from some quarters that the account of this problem included in the introductory chapter is too sketchy and brief to be of much use to the students. The new chapter, it is hoped, will remove the shortcoming.

In addition to a detailed description of the Copenhagen and the Ensemble Interpretations, this chapter also contains a brief account of the Hidden-Variable Theories (which are by-products of the interpretational problem) and the associated developments like the Neumann’s and Bell’s theorems. The important role played by the Einstein-Podolsky-Rosen Paradox in defining and delineating the interpretational problem is emphasized.

Since the proper time to worry over the interpretational aspect is after mastering the mathematical formalism, the chapter is placed at the end of the book. Minor additions include the topics of Density Matrix (Chapter 3) and Charge Conjugation (Chapter 10). The new edition thus differs from the old one only in some additions, but no deletions, of material. It is nearly two years since the revision was completed. Consequently, an account of certain later developments like the Greenberger-Home-ZeilingerMermin experiment [Mennin N.D. Physics Today 36 no 4, p. 38 (1985») could not be included in Chapter 12. It would, however, be of interest to note that the arguments against the EPR experiment presented in Section 12.4 could be extended to the case of the GHZ-Mermin thought-experiment also. For, the quantum mechanically incorrect assumption that a state vector chosen as the eigenvector of a product of observables is a common eigenvector of the individual (component) observables, is involved in this experiment as well. Several persons have been kind enough to send their critical comments on the book as well as suggestions for improvement. The author is thankful to all of them. and. in particular. to A.W. Joshi and S. Singh. The author is also thankful to P. Gopalakrishna Nambi for permitting to quote, in Chapter 12. from his Ph.D. thesis and to Ravi K. Menon for the use of some material from his Ph.D. work in this chapter.

About Book

Title: Quantum Mechanics
Author: V. K. Thankappan
Page: 552 pages
Publisher: New Academic Science Ltd; 4th Revised edition edition (30 June 2014)
Language: English
ISBN-10: 1781830142
ISBN-13: 978-1781830147

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