Quantum Heisenberg models and random loop representations

@article{Ueltschi2012QuantumHM,
  title={Quantum Heisenberg models and random loop representations},
  author={Daniel Ueltschi},
  journal={arXiv: Mathematical Physics},
  year={2012}
}
  • Daniel Ueltschi
  • Published 2012
  • Physics, Mathematics
  • arXiv: Mathematical Physics
  • We review random loop representations for the spin-1/2 quantum Heisenberg models, that are due to Toth (ferromagnet) and Aizenman-Nachtergaele (antiferromagnet). These representations can be extended to models that interpolate between the two Heisenberg models, such as the quantum XY model. We discuss the relations between long-range order of the quantum spins and the size of the loops. Finally, we describe conjectures about the joint distribution of the lengths of macroscopic loops, and of… CONTINUE READING

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