439 citations · 1.8k across the 39 of their papers we have counts for
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Many-body scar state intrinsic to periodically driven system: Rigorous results
Sho Sugiura, Tomotaka Kuwahara, Keiji Saito
The violation of the Floquet version of eigenstate thermalization hypothesis is systematically discussed with realistic Hamiltonians. Our model is based on the PXP type interaction…
Strictly linear light cones in long-range interacting systems of arbitrary dimensions
Tomotaka Kuwahara, Keiji Saito
In locally interacting quantum many-body systems, the velocity of information propagation is finitely bounded and a linear light cone can be defined. Outside the light cone, the am…
Clustering of conditional mutual information for quantum Gibbs states above a threshold temperature
Tomotaka Kuwahara, Kohtaro Kato, Fernando G. S. L. Brandão
We prove that the quantum Gibbs states of spin systems above a certain threshold temperature are approximate quantum Markov networks, meaning that the conditional mutual informatio…
Area law of non-critical ground states in 1D long-range interacting systems
Tomotaka Kuwahara, Keiji Saito
The area law for entanglement provides one of the most important connections between information theory and quantum many-body physics. It is not only related to the universality of…
Gaussian concentration bound and Ensemble equivalence in generic quantum many-body systems including long-range interaction
Tomotaka Kuwahara, Keiji Saito
This work explores fundamental statistical and thermodynamic properties of short-and long-range-interacting systems. The purpose of this study is twofold. Firstly, we rigorously pr…
Eigenstate thermalization from the clustering property of correlation
Tomotaka Kuwahara, Keiji Saito
The clustering property of an equilibrium bipartite correlation is one of the most general thermodynamic properties in non-critical many-body quantum systems. Herein, we consider t…