In the exactly solvable dimerized XY chain with staggered fields, the topological phase hosts a modulated string order with wavevector q=pi/2, while conventional magnetization vanishes at the phase boundary.
Onsager algebra and cluster XY-models in a transverse magnetic field
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abstract
The correlation functions of certain $n$-cluster XY models are explicitly expressed in terms of those of the standard Ising chain in transverse field.
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cond-mat.stat-mech 1years
2019 1verdicts
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String and conventional order parameters in the solvable modulated quantum chain
In the exactly solvable dimerized XY chain with staggered fields, the topological phase hosts a modulated string order with wavevector q=pi/2, while conventional magnetization vanishes at the phase boundary.