TY - RPRT TI - Quantum irregular spectrum in a corresponding classically chaotic lattice spin system. AU - K Nakamura AU - Y Nakahara AU - AR Bishop PY - 1985 DO - 10.1103/physrevlett.54.861 UR - https://pubmed.ncbi.nlm.nih.gov/10031640/ ID - 10031640 ER -