Abstract
Using the recently proposed density matrix renormalization group technique we show that the magnons in the S=1 antiferromagnetic Heisenberg chain effectively behave as bosons that condense at a critical field . We determine the spin-wave velocity, v=2.49(1), as well as the gap Δ=0.4107(1)J.
- Received 16 June 1993
DOI:https://doi.org/10.1103/PhysRevLett.71.1633
©1993 American Physical Society