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DMRG Study of Critical Behavior of the Spin-1/2 Alternating Heisenberg Chain
T. Papenbrock, T. Barnes, D. J. Dean +2
We investigate the critical behavior of the S=1/2 alternating Heisenberg chain using the density matrix renormalization group (DMRG). The ground-state energy per spin and singlet-t…
Ground-state properties of hard core bosons in one-dimensional harmonic traps
T. Papenbrock
The one-particle density matrices for hard core bosons in a one-dimensional harmonic trap are computed numerically for systems with up to 160 bosons. Diagonalization of the density…
Invariant manifolds and collective motion in many-body systems
T. Papenbrock, T. H. Seligman
Collective modes of interacting many-body systems can be related to the motion on classically invariant manifolds. We introduce suitable coordinate systems. These coordinates are C…
Odd-even binding effect from random two-body interactions
Thomas Papenbrock, Lev Kaplan, George F. Bertsch
Systematic odd-even binding energy differences in finite metallic particles are usually attributed to mean-field orbital energy effects or to a coherent pairing interaction. We sho…