Solutions to Problems in "Quantum Physics" by Michel Le Bellac
Problems 2.4.2, 2.4.3 and 3.3.2
Problems 3.3.6, 4.1.1 and 4.1.6
Problems 4.4.3, 5.5.1 and 5.5.3
Chapter 2
Problem 2.4.2 Commutators and traces
Problem 2.4.8 Commutators and a degenerate eigenvalue
Chapter 3
Chapter 4
Problem 4.4.1 Dispersion and eigenvectors
Problem 4.4.3 The Feynman-Hellmann theorem
Problem 4.4.6 The solar neutrino puzzle
Problem 4.4.7 The Schrödinger and Heisenberg pictures
Chapter 5
Problem 5.5.1 An orthonormal basis of eigenvectors
Chapter 6
Chapter 7
Problem 7.4.2 Spectrum of a Hermitian operator
Problem 7.4.3 Canonical commutation relations
Chapter 8
Problem 8.5.1 Rotations
Problem 8.5.5 The Thomas-Reiche-Kuhn sum rule
Problem 8.5.6 The center of mass and the reduced mass*
Chapter 9
Problem 9.7.10 The probability current in three dimensions
Problem 9.7.11 The level density
Chapter 10
Problem 10.7.1 Properties of J
Problem 10.7.7 Independence of the energy from m
Problem 10.7.8 The spherical well