Correlation functions of the~XX Heisenberg magnet and random walks of vicious walkers
Teoretičeskaâ i matematičeskaâ fizika, Tome 159 (2009) no. 2, pp. 179-193
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We investigate a relation between random walks on a one-dimensional periodic lattice and correlation functions of the XX Heisenberg spin chain. Operator averages over the ferromagnetic state play the role of generating functions of the number of paths traveled by so-called vicious random walkers (vicious walkers annihilate each other if they arrive at the same lattice site). We show that the two-point correlation function of spins calculated over eigenstates of the XX magnet can be interpreted as the generating function of paths traveled by a single walker in a medium characterized by a variable number of vicious neighbors. We obtain answers for the number of paths traveled by the described walker from a fixed lattice site to a sufficiently remote site. We provide asymptotic estimates of the number of paths in the limit of a large number of steps.
Keywords:
random walk, Heisenberg magnet, correlation function.
@article{TMF_2009_159_2_a0,
author = {N. M. Bogolyubov and K. L. Malyshev},
title = {Correlation functions of {the~XX} {Heisenberg} magnet and random walks of vicious walkers},
journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
pages = {179--193},
publisher = {mathdoc},
volume = {159},
number = {2},
year = {2009},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/TMF_2009_159_2_a0/}
}
TY - JOUR AU - N. M. Bogolyubov AU - K. L. Malyshev TI - Correlation functions of the~XX Heisenberg magnet and random walks of vicious walkers JO - Teoretičeskaâ i matematičeskaâ fizika PY - 2009 SP - 179 EP - 193 VL - 159 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_2009_159_2_a0/ LA - ru ID - TMF_2009_159_2_a0 ER -
%0 Journal Article %A N. M. Bogolyubov %A K. L. Malyshev %T Correlation functions of the~XX Heisenberg magnet and random walks of vicious walkers %J Teoretičeskaâ i matematičeskaâ fizika %D 2009 %P 179-193 %V 159 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2009_159_2_a0/ %G ru %F TMF_2009_159_2_a0
N. M. Bogolyubov; K. L. Malyshev. Correlation functions of the~XX Heisenberg magnet and random walks of vicious walkers. Teoretičeskaâ i matematičeskaâ fizika, Tome 159 (2009) no. 2, pp. 179-193. http://geodesic.mathdoc.fr/item/TMF_2009_159_2_a0/