Quantum-classical equivalence and ground-state factorization

  title={Quantum-classical equivalence and ground-state factorization},
  author={Jahanfar Abouie and Reza Sepehrinia},
  journal={Europhysics Letters},
We have performed an analytical study of quantum-classical equivalence for quantum XY-spin chains with arbitrary interactions to explore the classical counterpart of the factorizing magnetic fields that drive the system into a separable ground state. We demonstrate that the factorizing line in the parameter space of a quantum model is equivalent to the so-called natural boundary that emerges in mapping the quantum XY-model onto the two-dimensional classical Ising model. As a result, we show… 



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