Nonabelian Chiral Anomaly and the Spin Gap in One-Dimensional Interacting Electron Systems

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概要

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• We critically examine the issue raised by Nagaosa and Oshikawa [J. Phys. Soc. Jpn. 65 (1996)2241J on how Fujikawa's Jacobian arising from chiral anomaly contributes a topological term tothe derivative expansion of the ld Htrbbard model at half filling, thus governing the behaviourof' the spin gap. We find that w'hen the nonabeJian nature of the system is properly accottntedfor the schezne requires zaaodification. The naodified result is shoxvn to agree with nonabelianbosonization. Extensions to spin-Peierls systerns are outlined.

• 社団法人日本物理学会の論文
• 1998-03-15

著者

• Tanaka Akihiro

  Solid State Laboratory Tokai Establishment Japan Atomic Energy Research Institute

• MACHIDA Masahiko

  Center for Promotion of Computational Science and Engineering,Japan Atomic Energy Research Institute

関連論文

• Nonabelian Chiral Anomaly and the Spin Gap in One-Dimensional Interacting Electron Systems
• Direct Extension of Density-Matrix Renormalization Group to Two-Dimensional Quantum Lattice Systems: Studies of Parallel Algorithm, Accuracy, and Performance

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