Nonunitary spin-charge separation in a one-dimensional fermion gas

被引：96
|
作者：
Cheianov, VV
Zvonarev, MB
机构：
[1] NORDITA, DK-2100 Copenhagen O, Denmark
[2] APG, Niels Bohr Inst, Orsted Lab, DK-2100 Copenhagen, Denmark
[3] VA Steklov Math Inst, Petersburg Dept, St Petersburg 191023, Russia
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 17期
关键词：
D O I：
10.1103/PhysRevLett.92.176401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this Letter we report exact results on the infrared asymptotics of the one-particle dynamical correlation function of the gas of impenetrable spin 1/2 fermions at infinitesimal temperature. The correlation function shows signs of spin-charge separation with scaling behavior in the charge part and exponential decay as a function of the space coordinate in the spin part. Surprisingly, the anomalous dimensions in the charge part do not correspond to any unitary conformal field theory. We find that the fermion spectral weight has a power law divergency at low energy with the anomalous exponent -1/2.
引用
收藏
页码：176401 / 1
页数：4
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