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cond-mat.quant-gas2020★ 93 cited
Flat Band Quantum Scar
Yoshihito Kuno, Tomonari Mizoguchi, Yasuhiro Hatsugai
We show that a quantum scar state, an atypical eigenstate breaking eigenstate thermalization hypothesis embedded in a many-body energy spectrum, can be constructed in flat band sys…
cond-mat.quant-gas2020★ 31 cited
Interaction induced doublons and embedded topological subspace in a complete flat-band system
Yoshihito Kuno, Tomonari Mizoguchi, Yasuhiro Hatsugai
In this work, we investigate effects of weak interactions on a bosonic complete flat-band system. By employing a band projection method, the flat-band Hamiltonian with weak interac…