By Bernd Thaller

ISBN-10: 0387207775

ISBN-13: 9780387207773

ISBN-10: 0387271279

ISBN-13: 9780387271279

Advanced visible Quantum Mechanics is a scientific attempt to enquire and to coach quantum mechanics via computer-generated animations. it's a self-contained textbook that mixes chosen subject matters from atomic physics (spherical symmetry, the hydrogen atom, and debris with spin) with an creation to quantum info thought (qubits, EPR paradox, teleportation, quantum computers). It explores relativistic quantum mechanics and the unusual habit of Dirac equation strategies. a sequence of appendices covers vital themes from perturbation and scattering idea. The ebook locations an emphasis on principles and ideas, with a good to reasonable quantity of mathematical rigor.

Though this booklet stands on my own, it will probably even be paired with Thaller visible Quantum Mechanics to shape a entire direction in quantum mechanics. The software program for the 1st booklet earned the ecu educational software program Award 2000 for extraordinary innovation in its box.

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**Additional info for Advanced Visual Quantum Mechanics**

**Example text**

Let J1 ψ = m1 ψ and J2 ψ = m2 ψ. Then we ﬁnd immediately that iJ3 ψ = [J1 , J2 ]ψ = (m1 m2 − m2 m1 )ψ = 0. Hence, J3 (J1 + iJ2 )ψ = [J3 , J1 ]ψ + i[J3 , J2 ]ψ = (iJ2 − J1 )ψ = (im2 − m1 )ψ, and J3 (J1 + iJ2 )ψ = J3 (m1 + im2 )ψ = (m1 + im2 )J3 ψ = 0. Hence, im2 − m1 = 0, and because the eigenvalues of symmetric operators are always real, this implies that m1 = m2 = 0. We conclude that there are no nontrivial simultaneous eigenvectors belonging to nonzero eigenvalues. 58) J 2 = J12 + J22 + J32 commutes with all components Jk , [J 2 , Jk ] = 0, for k = 1, 2, 3.

Because we can get from mmin to mmax in integer steps (by applying the operator J+ to the corresponding eigenvectors), we ﬁnd that mmax − mmin = 2mmax must be a non-negative integer. Writing mmax = j we ﬁnd that the only allowed values of j are 0, 12 , 1, 32 , 2, and so forth. 73) we see that λ = j(j + 1). λ. 1. 2. For a ﬁxed j, all the 2j + 1 eigenvalues of J3 have the same multiplicity k (which might be inﬁnite). The eigenspace of J 2 belonging to the eigenvalue j(j + 1) is therefore k(2j + 1)-dimensional.

162) z 1 + O(z 2 ) , as z → 0. n ˆ (z) = 2 ! In scattering theory, one often deﬁnes the Riccati-Hankel functions ˆ ± (z) = n ˆ (z) ± iˆ j (z) = e±i(z− π/2) 1 + O(1/z) , as z → ∞. 163) h jˆ (z) = Further details about the Riccati-Bessel functions can be found in the book [1], where the notation jˆ(z) = zj(z), and n ˆ (z) = zy(z) is used. 3. Special Topic: Expanding the plane wave The plane waves exp(ik·x) are important solutions of the free-particle Schr¨ odinger equation, despite the fact that they are not square-integrable.

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