2002/09/17 by Massimo Campostrini, J. Wosiek, Jacek Wosiek · 3 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Noncommutative and Quantum Gravity Theories #Quantum Mechanics and Non-Hermitian Physics #hep-th
paper · pdf · doi:10.1016/s0370-2693(02)02969-6
published as Phys.Lett.B550:121-127,2002 · 13 pages, 1 figure
arxiv created 2002/09/17 · openalex publication_date 2002/12/01 · arxiv updated 2011/07/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
A new, recursive method of calculating matrix elements of polynomial hamiltonians is proposed. It is particularly suitable for the recent algebraic studies of the supersymmetric Yang–Mills quantum mechanics in any dimensions. For the D=2 system with the SU(2) gauge group, considered here, the technique gives exact, closed expressions for arbitrary matrix elements of the hamiltonian and of the supersymmetric charge, in the occupation number representation. Subsequent numerical diagonalization provides spectrum and restricted Witten index of the system with very high precision (taking into account up to 105 quanta). Independently, the exact value of the restricted Witten index is derived analytically for the first time.