427 citations · 3.2k across the 73 of their papers we have counts for
74 papers
The equivalence of topological indices for -symmetric quantum spin chains
Hal Tasaki
Symmetry-protected topological (SPT) phases in quantum spin chains are distinguished by topological indices. Ogata's operator-algebraic indices apply to a broad range of symmetry c…
Full macroscopic thermalization and the formation of Schrödinger's cats by unitary time evolution in the weakly perturbed Ising model - Applications of the Roos-Sugimoto-Teufel-Tumulka-Vogel theory
Hal Tasaki
We study macroscopic thermalization in the ferromagnetic Ising model with a weak generic (highly nonlocal and many-body) random quantum perturbation. We prove that a single typical…
Hierarchical Lorentz Mirror Model: Normal Transport and a Universal Mean--Variance Law
Raphael Lefevere, Hal Tasaki
The Lorentz mirror model provides a clean setting to study macroscopic transport generated solely by quenched environmental randomness. We introduce a hierarchical version whose di…
Absence of nontrivial local conserved quantities in the quantum compass model on the square lattice
Mahiro Futami, Hal Tasaki
By extending the method developed by Shiraishi, we prove that the quantum compass model on the square lattice does not possess any local conserved quantities except for the Hamilto…
Trees that can be grown in "too many" ways: Bouch's construction and a bound for every size
Hal Tasaki
We show that, for every positive integer , there is a rooted tree on the square lattice that can be grown in at least distinct ways, where denotes the number of bon…
The XY and XYZ models on the two or higher dimensional hypercubic lattice do not possess nontrivial local conserved quantities
Naoto Shiraishi, Hal Tasaki
We study the quantum spin system on the -dimensional hypercubic lattice with with uniform nearest-neighbor interaction of the XY or XYZ type and arbitrar…