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PHYS223 : Quantum Mechanics

Year:11/12
Department:Physics
Level:Part II (yr 2)
Learning Hours:150
Credit Points:15
Weight:0.5
Course Convenor:Professor HU Schomerus
Status:Live

Assessment Rules

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  • 80% Exam
  • 20% Coursework

CMod description

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Axioms for QM [Eigenvalues, simultaneous Eigenvectors, Eigen-bases, scalar products and ortho-normality relations, diagonalisation, differential and matrix operators, commutation relations, stationary states, superposition and Fourier analysis, completeness relations, the Hamiltonian and unitary evolution, probability amplitudes and physical interpretations].

 

1D Schrodinger equation for a spinless particle in potential V(x) [Simple Harmonic Oscillator (SHO), Hermite Functions, Zero-Point Energy, Coherent states, notions of resonance in wells and transmission and reflection coefficients, concept of orbital parity and reflection symmetry].

 

3D Schrodinger equation for spinless particle in potential V(x,y,z) [3D SHO, degeneracy, Barrier penetration and α decay].

 

Rotations and Angular Momentum [Commutation Relations for Orbital operators Lx,Ly,Lz,L2, simultaneous eigenfunctions, Schrodinger representation in Cartesian and Spherical Polar Coordinates, angular Laplacian, and Spherical harmonics].

 

3D Central Potentials V(r) [Spherical Polar Formulation, Coulomb potential, bound states, the H atom without electron spin].

 

Electron Spin [Pauli matrices and complex 2D spinors, the Pauli-Schrodinger equation, magnetic moment of the electron, the H atom with electron spin].

 

Addition of Angular Momentum [Clebsch-Gordan techniques].

 

Interaction of magnetic moment with static magnetic field [Spin precession and magnetic resonance, intrinsic nucleon spin].

 

Several electron atoms [Identical Particles, Bosons and Fermions, atomic structure and the periodic table, the electron-electron interaction].

 

Approximation Methods [Time-independent Rayleigh-Schrodinger Perturbation theory, non-degenerate perturbation theory, degenerate perturbation theory, variational methods and WKB, Zeeman and Stark effects, H atom in weak (strong) magnetic (electric) field, periodic potentials and band structure, paramagnetism].

 

Time Dependent Interactions [The Heisenberg Picture and time dependent Hamiltonians, time dependent perturbation theory, first-order transitions, transition into a continuous spectrum and the Fermi-Golden rule, periodic perturbations, the radiation field and selection rules for electric dipole transitions, Hamiltonian for emission and absorption of photons, spontaneous emission and the Einstein coefficients, applications to lasers].

 

Curriculum Design: Outline Syllabus

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- revision of essential mathematics for quantum mechanics:

    - analysis of trigonometric and exponential functions

    - ordinary and partial differential equations

    - linear algebra with two-component vectors and matrices

particle-wave duality and the Schr¨odinger equation

applications in 1d:

    - particle in the box

    - piecewise constant potentials

    - harmonic oscillator

    - notions of bound state, ground state, zero-point energy, tunnelling and resonance

stationary perturbation theory and the variation technique

applications in 3d:

    - 3d particle in the box

    - 3d harmonic oscillator

    - angular momentum

    - hydrogen atom

spins and electrons in magnetic fields

    - cyclotron motion

    - Stern-Gerlach experiment

    - spin precession

    - Zeeman effect

many particles (Pauli principle and chemical table of elements)

axioms and advanced mathematics of quantum mechanics

    - states as vectors (superposition principle); associated linear algebra

    - time dependence

    - observables as operators; associated linear algebra and functional analysis (eigenvalue problems, Fourier analysis)

    - probabilities and expectation values;

    - commutation relations

    - uncertainty principle

    - comparison to classical mechanics

Dirac notation; compact revision of the module

 

Educational Aims: Subject Specific: Knowledge, Understanding and Skills

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The LTA strategy is fourfold. Each week the core physics material is developed in the lectures. Students are expected to reinforce and extend the lecture material by private study of the course textbook and other sources. Student's understanding is consolidated and assessed via the fortnightly work sheet, which is completed by students independently, then marked and discussed by the lecturer at the seminar.

 

Learning Outcomes: Subject Specific: Knowledge, Understanding and Skills

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On completion of the module, students should be able to:

apply quantum mechanics to simple, exactly solvable problems in one and three dimensions, including the hydrogen atom, by solving the Schr¨odinger equation

systematically find approximate solutions for not exactly solvable systems

work out predictions for expectation values and probabilities in the context of experiments on quantum systems

understand and appreciate the mathematical consistency of quantum mechanics

 

Curriculum Design: Select Bibliography

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For preparation: revise Young & Freedman, chpts. 38-40 (PHYS105).

For the module: select one (better: two) of:

D Griffith, Introduction to Quantum Mechanics

R Liboff, Introductory Quantum Mechanics

J J Sakurai, Modern Quantum Mechanics

R Shankar, Principles of Quantum Mechanics, 2nd ed.

A I M Rae, Quantum Mechanics, 4th ed.

Lancaster University
Bailrigg
LancasterLA1 4YW United Kingdom
+44 (0) 1524 65201