General conditions on site-dependent interaction ranges in Z(N) quantum chains ensure free-particle eigenspectra, with dynamical critical exponents computed for constant even/odd-site ranges.
Parafermions in the tau-2 model II
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abstract
Many years ago Baxter introduced an inhomogeneous two-dimensional classical spin model, now called the $\tau_2(t)$ model with free boundary conditions, and he specialized the resulting quantum spin-chain Hamiltonian in a special limit to a simple clock Hamiltonian. Recently, Fendley showed that this clock Hamiltonian can be expressed in terms of free "parafermions." Baxter followed this up by showing that this construction generalizes to the more general $\tau_2(t)$ model, provided some conjectures hold. In this paper, we will compare the different notations and approaches enabling us to express the Hamiltonians in terms of projection operators as introduced by Fendley. By examining the properties of the raising operators, we are then able to prove the last unproven conjecture in Baxter's paper left in our previous paper. Thus the eigenvectors can all be written in terms of these raising operators.
fields
cond-mat.stat-mech 1years
2025 1verdicts
UNVERDICTED 1representative citing papers
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Free fermionic and parafermionic multispin quantum chains with non-homogeneous interacting ranges
General conditions on site-dependent interaction ranges in Z(N) quantum chains ensure free-particle eigenspectra, with dynamical critical exponents computed for constant even/odd-site ranges.