Condensed matter theory is an enormous, rich, evolving field which is
impossible for a single professor to explain or even describe in a single
graduate course. In order to help our students navigate this
varied terrain, Cornell's condensed-matter theory group has developed
**Basic Training in Condensed-Matter Theory**, a challenging,
modular
course taught once per year by a rotation of four condensed-matter theorists.
Students are exposed to a different set of active research areas each year,
and learn sophisticated analytical and numerical methods in the extensive
exercises.
This year our course replaces the traditional many-body physics course 654,
and will incorporate some of the tools and concepts from that field.
Tentatively, we plan to cover

Jan 21 - Feb 13 | James Sethna (sethna@lassp.cornell.edu, Clark 528) | Continuum Theories of Crystal Defects | Grader: Yong Chen (yc355@cornell.edu) |

Feb 18 - Mar 13 | Erich Mueller (em256@cornell.edu, Clark 514a) | Probes of Cold Atoms | Grader: Stefan Natu (ssn8@cornell.edu) |

Mar 25 - April 10 | Craig Fennie (fennie@cornell.edu, Clark 226) | Competing Ferroic orders: the magnetoelectric effect | Grader: Johannes Lischner (jl597@cornell.edu) |

April 15 - May 1 | Eun-Ah Kim (eun-ah.kim@cornell.edu, Clark 507) | Quantum Criticality | Grader: Kaden Hazzard (kh279@cornell.edu) |

For more information, please contact any of the instructors.

Teaser 1: | Due Wednesday April 15 | Teaser 1 |

Syllabus | Wednesday April 15 | Syllabus |

Syllabus | Wednesday April 15 | Lecture 1 |

Homework 1: | Due May 1, 2009 | Homework 1 |

Teaser 1: | Due Friday April 3 | Teaser 1 | Solutions |

March 25 | Lecture 1 |

April 1 | Lecture 2 |

April 3 | Lecture 3 |

April 8 | Lecture 4 |

April 10 | Lecture 5 |

Teaser 1: | Due Wednesday Feb 18 | teaser1.pdf |

Teaser 2: | Due Friday Feb 20 | teaser2.pdf |

Teaser 3: | Due Wednesday Feb 25 | teaser3.pdf |

Teaser 4: | Due Friday Feb 27 | teaser4.pdf |

Teaser 4: | Due Friday Mar 3, 2009 | teaser5.pdf |

image.dat |

Lecture 1: | Wednesday Feb 18 | OpticalAbs.pdf |

Lecture 2: | Wednesday Feb 20 | CollectiveModes.pdf |

Lecture 4: | Wednesday Feb 25 | Helium.pdf |

Jan 21, 2009 |
A: Because we are interested in slow long length-scale properties.
Q: What are the relevant continuum fields for any system?
A: Conserved quantities (density, energy density, momentum density) and broken symmetries (magnetism, superconducting order,...). teaser: Why can't we run faster than the speed of sound |

Jan 22, 2009 |
Q: Why are we so weak?
A: dislocations.
Q: Why are we so strong?
A: composite materials. Discussion of how to generate most general continuum free energy consistent with symmetries. Example (multiferroics). Discussion of boundary terms. Teaser: Boundary terms can stabilize defects. |