1. PHYS 30101 Quantum Mechanics PHYS 30101 Quantum Mechanics Dr Jon Billowes Nuclear Physics Group (Schuster Building, room 4.10) j.billowes@manchester.ac.uk These slides at: www.man.ac.uk/dalton/phys30101 Lecture 2

2. Plan of action 1.Basics of QM 2.1D QM Will be covered in the following order: 1.1 Some light revision and reminders. Infinite well 1.2 TISE applied to finite wells 1.3 TISE applied to barriers – tunnelling phenomena 1.4 Postulates of QM (i) What Ψ represents (ii) Hermitian operators for dynamical variables (iii) Operators for position, momentum, ang. Mom. (iv) Result of measurement 1.5 Commutators, compatibility, uncertainty principle 1.6 Time-dependence of Ψ

3. Recap Particle in an infinite well -a +a V=0 V infinity (1-D TISE with V=0) Region IIRegion I

4. Wavefunctions for an infinite square well

5. Finite square well: solutions for tan ka = μ/k where thus In graph below, y = ka

6. Wavefunctions for a finite well (1-D)