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Read e-book online Exercises in Quantum Mechanics: A Collection of Illustrative PDF

By H.A. Mavromatis

ISBN-10: 9401051720

ISBN-13: 9789401051729

ISBN-10: 9401126526

ISBN-13: 9789401126526

This monograph is written in the framework of the quantum mechanical paradigm. it's modest in scope in that it truly is limited to a few observations and solved illustrative difficulties no longer on hand in any of the numerous regular (and numerous first-class) texts or books with solved difficulties which were written in this topic. also a number of roughly regular difficulties are integrated for continuity and reasons of comparability. The desire is that the issues made and difficulties solved will supply the coed a few extra insights and a greater take hold of of this interesting yet mathematically a little bit concerned department of physics. The hundred and fourteen difficulties mentioned have deliberately been selected to contain at the very least technical complexity whereas nonetheless illustrating the implications of the quantum-mechanical formalism. relating notation, precious expressions are displayed in oblong bins whereas calculational info which one might need to bypass are integrated in sq. brackets. Beirut HARRY A. MAVROMATIS June, 1985 IX Preface to moment variation greater than 5 years have handed given that I ready the 1st variation of this mono­ graph. the current revised version is extra appealing in format than its predecessor, and such a lot, if no longer the entire mistakes within the unique version (many of which have been kindly mentioned through reviewers, colleagues, and scholars) have now been corrected. also the fabric within the unique fourteen chapters has been prolonged with major additions to Chapters eight, thirteen, and 14.

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Additional info for Exercises in Quantum Mechanics: A Collection of Illustrative Problems and Their Solutions

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4. Op. , v. 2, p. 79. 5. Op. , v. 2, p. 193. 6. Op. , v. 2, p. 195. 7. 1. B. W. Jolley, Summation of Series, Dover (1961), p. 16. 8. Op. , p. 32. 9. E. Merzhacher, Quantum Mechanics, Wiley (1970), p. 60. ;(x, t) of the Schrodinger equation. 1) it follows from the delta-function property of Eq. j'i; 00 -00 dy = 1:( _ 1i u x ') x, exp (ipX) T

X, 0). One can proceed as in the previous examples or note that since, according to Eq. 16) -00 where according to Eq. (x', 0) exp (-ik'x')dx' = -00 Hence A(k + k') = 1 tn= v21r 1 ¢>(x') 00 exp (-ix'k')dx' -00 ~ v21r = 1 00 ¢>(x') exp {-ix'(k' - k)}dx'. ~1°O ¢>(x'-x)exp{i(x'-x)k'}dx'. 17) -00 Comparing Eqs. 17) one notes that if one identifies A(k') with a particular (even) function ¢>( x' - x) one can then identify ¢>( x) with the corresponding A(k + k'). 2 for instance, 4>(x) =~ [38 [sin (8X/21i)] 2Y;r;, 2 and 8x/21i A(k+k') !

Lifchitz, Mechanique Quantique, Mir (1966), p. 94. 2. I. S. Gradshteyn and I. M. Ryzhik, Tables of Integrals, Series and Products, Fourth (English) Edition, prepared by A. Jeffrey, Academic Press, New York (1980), p. 292. 3. Op. cit. p. 405. 1) (cf. Eq. 18) ). e. though the momentum is precisely known (in other words tlp = 0), tlx = 00, where tlA is rigorously the square root of the variance of A (see Eq. 26) ), or more loosely speaking represents the uncertainty in A. This shortcoming may be easily removed by constructing a wavepacket where A(p') is a function concentrated about p' (cf.

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Exercises in Quantum Mechanics: A Collection of Illustrative Problems and Their Solutions by H.A. Mavromatis


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