248 / FIELDS OF INSTRUCTION PS 681-COMPUTER METHODS IN PHYSICS. 3 credits Prerequisite: PS 541, an elementary knowledge of Fortran programming. Numerical techniques useful in solving physical problems. Aspects of advanced Fortran programming. Use of the computer. PS 682-LOW-TEMPERATURE PHYSICS. 3 credits Prerequisites: PS 644, PS 648. Techniques and problems of low-temperature physics; production and measurement of low temperatures; properties of liquid helium, superconductivity, paramagnetism, magnetic cooling, thermodynamic aspects. PS 690-INDIVIDUAL WORK. 3 to 5 credits Assigned reading program or development of an assigned experimental problem. Work selected to meet needs and interests of the student. May be repeated with change of content up to a maximum of 18 credits. PS 696-DEPARTMENTAL SEMINAR. 1 credit Physics, astrophysics, and astronomy topics presented by local staff members and visiting scientists. May be repeated for credit. Graded on an S/U basis. PS 697-SUPERVISED RESEARCH. 1 to 5 credits Credit not applicable toward degree. May be repeated. PS 698-SUPERVISED TEACHING. 1 to 5 credits Credit not applicable toward degree. May be repeated. PS 699-MASTER'S RESEARCH. 1 to 17 credits PS 703-ADVANCED CLASSICAL MECHANICS. 3 credits Prerequisite: PS 601. Rigid rotators; elasticity; vibrations, normal modes, waves. PS 713-ADVANCED ELECTROMAGNETIC THEORY. 3 credits Prerequisite: PS 612. Special topics. Content varies, but may include radiation reaction, Lienard-Wiechert potentials, Cerenkov effect, nonlinear optics. PS 722-ADVANCED STATISTICAL MECHANICS 1. 3 credits Prerequisite: PS 622. Irreversible processes, many-body problem, Ising model, cluster expansions, phase transitions. PS 723-ADVANCED STATISTICAL MECHANICS 2. 3 credits Prerequisite: PS 722. Continuation of PS 722. PS 741-ATOMIC AND MOLECULAR COLLISIONS 1. 3 credits Prerequisite: PS 645. Classical and quantum theories of collisions of atoms and molecules, with emphasis on low-energy collisions. Approximate theoretical methods and recent experimental developments. PS 742-ATOMIC AND MOLECULAR COLLISIONS 2. 3 credits Prerequisite: PS 741. Continuation of PS 741. PS 753-PHYSICS OF THE SOLID STATE 1. 3 credits Prerequisites: PS 621, PS 622, PS 644. Band theory and symmetry properties. PS 754-PHYSICS OF THE SOLID STATE 2. 3 credits Prerequisite: PS 753. Photons, transport properties, and electron dynamics. PS 755-PHYSICS OF THE SOLID STATE 3. 3 credits Prerequisite: PS 754. Magnetism. PS 756-THEORY OF ATOMIC AND MOLECULAR STRUCTURE 1. 3 credits Identical with CY 756. Prerequisite: PS 649. Mathematical techniques used in atomic, molecular, and solid-state theory. The one-electron approximation and the general quantum-mechanical many-body problem. Selected advanced topics. PS 757-THEORY OF ATOMIC AND MOLECULAR STRUCTURE 2. 3 credits Identical with CY 757. Prerequisite: PS 756. Continuation of PS 756. PS 764-THEORY OF NUCLEAR SPECTROSCOPY. 3 credits