Infinite-randomness fixed points for chains of non-Abelian quasiparticles.
Infinite-randomness fixed points for chains of non-Abelian quasiparticles.
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DOI:
10.1103/physrevlett.99.140405
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发表时间:
2006-12
影响因子:
8.6
通讯作者:
N. Bonesteel;Kun Yang
中科院分区:
文献类型:
--
作者:
N. Bonesteel;Kun Yang
One-dimensional chains of non-Abelian quasiparticles described by SU(2)k Chern-Simons-Witten theory can enter random singlet phases analogous to that of a random chain of ordinary spin-1/2 particles (corresponding to k-->infinity). For k=2 this phase provides a random singlet description of the infinite-randomness fixed point of the critical transverse field Ising model. The entanglement entropy of a region of size L in these phases scales as S(L) approximately lnd/3 log(2)L for large L, where d is the quantum dimension of the particles.