59 citations · 410 across the 15 of their papers we have counts for
15 papers
The Yang-Baxter Equation for the Chiral Potts Model and Integrable Parafermions
Zhao Zhang
A new type of Yang-Baxter equation (YBE) for -operators depending on three spectral parameters is constructed from the star-triangle relation for the chiral Potts model. As the…
Integrable Massless and Massive Fermions
Zhao Zhang
One-dimensional integrable fermions can be classified into massless and massive regimes, and the -operator for the latter can be constructed from that of the former. Here, I def…
Bicolor loop models and their long range entanglement
Zhao Zhang
Quantum loop models are well studied objects in the context of lattice gauge theories and topological quantum computing. They usually carry long range entanglement that is captured…
Ergodic Archimedean dimers
Henrik Schou Røising, Zhao Zhang
We study perfect matchings, or close-packed dimer coverings, of finite sections of the eleven Archimedean lattices and give a constructive proof showing that any two perfect matchi…
The frustration-free fully packed loop model
Zhao Zhang, Henrik Schou Røising
We consider a quantum fully packed loop model on the square lattice with a frustration-free projector Hamiltonian and ring-exchange interactions acting on plaquettes. A boundary Ha…
Hidden Bethe states in a partially integrable model
Zhao Zhang, Giuseppe Mussardo
We present a one-dimensional multi-component model, known to be partially integrable when restricted to the subspaces made of only two components. By constructing fully anti-symmet…
Observation of E8 Particles in an Ising Chain Antiferromagnet
Zhao Zhang, Kirill Amelin, Xiao Wang +9
Near the transverse-field induced quantum critical point of the Ising chain, an exotic dynamic spectrum consisting of exactly eight particles was predicted, which is uniquely descr…
Spectra of Quasi-one-dimensional Antiferromagnet BaCoVO under Transverse Field
Haiyuan Zou, Y. Cui, X. Wang +16
We report V nuclear magnetic resonance (NMR) and inelastic neutron scattering (INS) measurements on a quasi-1D antiferromagnet BaCoVO under transverse field alon…
Prime Suspects in a Quantum Ladder
Giuseppe Mussardo, Andrea Trombettoni, Zhao Zhang
In this Letter we set up a suggestive number theory interpretation of a quantum ladder system made of N coupled chains of spin 1/2. Using the hard-core boson representation and a l…
Stationary State Degeneracy of Open Quantum Systems with Non-Abelian Symmetries
Zhao Zhang, Joseph Tindall, Jordi Mur-Petit +2
We study the null space degeneracy of open quantum systems with multiple non-Abelian, strong symmetries. By decomposing the Hilbert space representation of these symmetries into an…
Holographic rainbow networks for colorful Motzkin and Fredkin spin chains
Rafael N. Alexander, Amr Ahmadain, Zhao Zhang +1
We present bulk tensor networks that exactly represent the ground states of a continuous family of one-dimensional frustration-free Hamiltonians. These states, which are known as a…
Entropy, gap and a multi-parameter deformation of the Fredkin spin chain
Zhao Zhang, Israel Klich
We introduce a multi-parameter deformation of the Fredkin spin chain whose ground state is a weighted superposition of Dyck paths, depending on a set of parameters alon…
Deformed Fredkin Spin Chain with Extensive Entanglement
Olof Salberger, Takuma Udagawa, Zhao Zhang +3
We introduce a new spin chain which is a deformation of the Fredkin spin chain and has a phase transition between bounded and extensive entanglement entropy scaling. In this chain,…
Quantum phase transition from bounded to extensive entanglement entropy in a frustration-free spin chain
Zhao Zhang, Amr Ahmadain, Israel Klich
We introduce a continuous family of frustration-free Hamiltonians with exactly solvable ground states. We prove that the {ground state of our model is non-degenerate and exhibits}…
Coupled wire model of symmetric Majorana surfaces of topological superconductors
Sharmistha Sahoo, Zhao Zhang, Jeffrey C. Y. Teo
Time reversal symmetric topological superconductors in three spatial dimensions carry gapless surface Majorana fermions. They are robust against any time reversal symmetric single-…