439 citations · 1.8k across the 39 of their papers we have counts for
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quant-ph2014★ 59 cited
Connecting global and local energy distributions in quantum spin models on a lattice
Itai Arad, Tomotaka Kuwahara, Zeph Landau
Generally, the local interactions in a many-body quantum spin system on a lattice do not commute with each other. Consequently, the Hamiltonian of a local region will generally not…
quant-ph2014
Spectral gap and the exponential localization in general one-particle systems
Tomotaka Kuwahara
We investigate the relationship between the spectral gap delta E_0 and the localization length xi in general one-particle systems. A relationship for many-body systems between the…