Volume 125, Number 1, January 2019
|Number of page(s)||7|
|Published online||04 February 2019|
Complete characterization of spin chains with two Ising symmetries
Department of Physics and Center for Quantum Entanglement Science and Technology, Bar-Ilan University 52900 Ramat Gan, Israel
Received: 24 May 2018
Accepted: 3 January 2019
Spin chains with two Ising symmetries are the Jordan-Wigner duals of one-dimensional interacting fermions with particle-hole and time-reversal symmetry. From earlier works on Majorana chains, it is known that this class of models has 10 distinct topological phases. In this paper, we analyze the physical properties of the correspondent 10 phases of the spin model. In particular, thanks to a set of two non-commuting dualities, we determine the local and non-local order parameters of the phases. We find that 4 phases are topologically protected by the Ising symmetries, while the other 6 break at least one symmetry. Our study highlights the non-trivial relation between the topological classifications of interacting bosons and fermions.
PACS: 03.65.Vf – Phases: geometric; dynamic or topological / 05.30.Rt – Quantum phase transitions / 75.10.Pq – Spin chain models
© EPLA, 2019
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