2 papers
cond-mat1999
Tunneling problems by quantum Monte Carlo
Nikolai Prokof'ev, Boris Svistunov, Igor Tupitsyn
We develop a new numerical scheme which allows precise solution of coherent tunneling problems, i.e., problems with exponentially small transition amplitudes between quasidegenerat…
cond-mat.str-el1998
Quantum spin chains in a magnetic field
V. A. Kashurnikov, N. V. Prokof'ev, B. V. Svistunov +1
We demonstrate that the ``worm'' algorithm allows very effective and precise quantum Monte Carlo (QMC) simulations of spin systems in a magnetic field, and its auto-correlation tim…