PERIMETER SCHOLARS INTERNATIONAL

Course on "Quantum spin simulations, April 5-23, 2010

**Anders W. Sandvik, Boston University**

Diagonalization programs used in the tutorial and homework, April 15

**Full diagonalization of the S=1/2 Heisenberg chain**
No symmetries used
Using magnetization conservation
Momentum states
Semi-momentum states
Semi-momentum states and spin-inversion; thermodynamics

**Lanczos diagonalization of the S=1/2 Heisenberg chain**
Lanczos calculation
using semi-momentum states and spin-inversion symmetry