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arXiv 0906.0431cond-mat.stat-mech
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一维任意子含时场-场关联函数的非共形渐近行为

Non-conformal asymptotic behavior of the time-dependent field-field correlators of 1D anyons

Ovidiu I. Patu, Vladimir E. Korepin, Dmitri V. Averin

摘要:

计算了有限温度下一维不可穿透任意子的场-场关联函数的大时距行为。结果再现已知的渐近不可穿透玻色子和自由费米子在适当的限制的统计参数。所得到的关联函数的渐近行为是由在带底的准粒子态的谱密度的奇异性所支配的,并且不同于共形场论的预测。然而,人们可以争辩说,低能探针的任意子响应仍然由渐近展开式中的共形项决定。

英文摘要:

The exact large time and distance behavior of the field-field correlators has been computed for one-dimensional impenetrable anyons at finite temperatures. The result reproduces known asymptotics for impenetrable bosons and free fermions in the appropriate limits of the statistics parameter. The obtained asymptotic behavior of the correlators is dominated by the singularity in the spectral density of the quasiparticle states at the bottom of the band, and differs from the predictions of the conformal field theory. One can argue, however, that the anyonic response to the low-energy probes is still determined by the conformal terms in the asymptotic expansion.

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