3 papers
cond-mat.str-el2025
Exact critical exponents of the Motzkin and Fredkin Chains
Olai B. Mykland, Zhao Zhang
The Motzkin and Fredkin chains are frustration-free spin models with exactly solvable ground states whose -deformations realize an exotic quantum phase transition from a disorde…
quant-ph2025
Highly Entangled Quantum Spin Chains on Fermat's Spiral
Zhao Zhang, Olai B. Mykland
We investigate the entanglement entropy (EE) and spectral gap properties of highly entangled spin chains arranged along a Hamiltonian path on a two-dimensional (2D) lattice with ge…
quant-ph2025
Highly Entangled 2D Ground States: Tensor Network, Order Parameter and Correlation
Olai B. Mykland, Zhao Zhang
In this article we present analytical results on the exact tensor network representations and correlation functions of the first examples of 2D ground states with quantum phase tra…