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cond-mat.str-el2025
Scan calculation of the density of states: real space cluster perturbation theory applied to inhomogeneous Hubbard model in one dimension
Kaito Matsuki, Chisa Hotta, Kenichi Asano
We present the spectral analysis of a one-dimensional Hubbard model with a parabolic potential, using a real-space cluster perturbation theory (rCPT) designed to study spatially in…
cond-mat.str-el2018★ 28 cited
Magnetic susceptibility of quantum spin systems calculated by sine square deformation: one-dimensional, square lattice, and kagome lattice Heisenberg antiferromagnets
Chisa Hotta, Kenichi Asano
We develop a simple and unbiased numerical method to obtain the uniform susceptibility of quantum many body systems. When a Hamiltonian is spatially deformed by multiplying it with…
cond-mat.str-el2004★ 16 cited
Instability toward biexciton crystallization in one-dimensional electron-hole systems
Kenichi Asano, Tetsuo Ogawa
One-dimensional (1D) electron-hole (e-h) systems in a high-density regime is investigated by means of bozonization techniques. It turned out that the systems are insulating even at…