954 citations
- The University of TokyoJP11 papers
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Showing 2020 · math-phShow all
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math-ph2020★ 1 cited
Power-Law Decay Exponents of Nambu-Goldstone Transverse Correlations
Tohru Koma
We study a quantum antiferromagnetic Heisenberg model on a hypercubic lattice in three or higher dimensions . When a phase transition occurs with the continuous symmetry br…
math-ph2020★ 4 cited
Stability of the Spectral Gap for Lattice Fermions
Tohru Koma
It is widely believed that the spectral gap above the Fermi sea ground state of lattice free fermions is stable against generic weak interactions. Quite recently, Hastings presente…