Published August 1988
| Version v1
Journal article
Energy gaps and elementary excitations for certain VBS-quantum antiferromagnets
Description
It is shown for a class of antiferromagnetic Hamiltonians how one can get lower bounds for the energy gap above the ground state by diagonalizing a finite system. This method is applied to certain spin chains (including a spin-1 chain). Trial wave functions are proposed for the elementary excitations and are tested in the case of the spin-1 chain
Additional details
Publishing Information
- Journal Title
- Journal of Statistical Physics
- Journal Volume
- 52
- Journal Issue
- 3-4
- Series
- J. Stat. Phys.
- Journal Page Range
- 627-638
- ISSN
- 0022-4715
- CODEN
- JSTPB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20066758
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- ANTIFERROMAGNETIC MATERIALS; BOUNDARY CONDITIONS; CRYSTAL LATTICES; CRYSTAL MODELS; EIGENVALUES; ENERGY GAP; EXCITATION; EXCITED STATES; GROUND STATES; HAMILTONIANS; HEISENBERG MODEL; IRREDUCIBLE REPRESENTATIONS; QUANTUM MECHANICS; SPIN; STATISTICAL MECHANICS; SU-2 GROUPS; WAVE FUNCTIONS
- Descriptors DEC
- ANGULAR MOMENTUM; CRYSTAL STRUCTURE; ENERGY LEVELS; ENERGY-LEVEL TRANSITIONS; FUNCTIONS; LIE GROUPS; MAGNETIC MATERIALS; MATERIALS; MATHEMATICAL MODELS; MATHEMATICAL OPERATORS; MECHANICS; PARTICLE PROPERTIES; QUANTUM OPERATORS; SU GROUPS; SYMMETRY GROUPS