Quantum phase transitions in spin-1 compass chains

Abstract

The ground-state phase diagram and quantum phase transitions (QPTs) in a spin-1 compass chain are investigated by the infinite time-evolving block decimation (iTEBD) method. Various phases are discerned by energy densities, spin correlations and entanglement entropy. A generalized string correlator is found to be capable of describing the nonlocal string order in the disordered phase. Furthermore, in the noncritical disordered phase, the spin-spin correlations are found to decay exponentially. Except for a multicritical point ($J_1=0$, $J_2=0$), the QPTs are determined to have second-order characters. In addition, the central charges on these critical phase boundaries are determined to be $c$=1/2, therefore these QPTs belong to the Ising universality class.

6 pages, 8 figures

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Cited by in corpus (4)

• Quantum phase transitions in the spin-1 Kitaev-Heisenberg chain
• Quantum many-body scars in spin-1 Kitaev chain with uniaxial single-ion anisotropy
• Islands of Chiral Solitons in Integer Spin Kitaev Chains
• One-dimensional frustrated plaquette compass model: Nematic phase and spontaneous multimerization