Spin dynamics in a one-dimensional ferromagnetic Bose Gas

被引：108

作者：

Zvonarev, M. B. ^{[1
]}

Cheianov, V. V. ^{[2
]}

Giamarchi, T. ^{[1
]}

机构：

[1] Univ Geneva, DPMC MaNEP, CH-1211 Geneva 4, Switzerland

[2] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 24期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.99.240404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the propagation of spin excitations in a one-dimensional ferromagnetic Bose gas. While the spectrum of longitudinal spin waves in this system is soundlike, the dispersion of transverse spin excitations is quadratic, making a direct application of the Luttinger liquid theory impossible. By using a combination of different analytic methods we derive the large time asymptotic behavior of the spin-spin dynamical correlation function for strong interparticle repulsion. The result has an unusual structure associated with a crossover from the regime of trapped spin wave to an open regime and does not have analogues in known low-energy universality classes of quantum 1D systems.

引用

页数：4

共 25 条

[1]

BLOCH I, IN PRESS REV MOD PHY

[2] QUANTUM TUNNELLING IN A DISSIPATIVE SYSTEM [J].

CALDEIRA, AO ;

LEGGETT, AJ .

ANNALS OF PHYSICS, 1983, 149 (02) :374-456

[3] EXACT CALCULATION OF SPECTRAL PROPERTIES OF A PARTICLE INTERACTING WITH A ONE-DIMENSIONAL FERMIONIC SYSTEM [J].

CASTELLA, H ;

ZOTOS, X .

PHYSICAL REVIEW B, 1993, 47 (24) :16186-16193

[4] Zero temperature correlation functions for the impenetrable fermion gas [J].

Cheianov, VV ;

Zvonarev, MB .

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 2004, 37 (06) :2261-2297

[5] Nonunitary spin-charge separation in a one-dimensional fermion gas [J].

Cheianov, VV ;

Zvonarev, MB .

PHYSICAL REVIEW LETTERS, 2004, 92 (17) :176401-1

[6] Polarization of interacting bosons with spin [J].

Eisenberg, E ;

Lieb, EH .

PHYSICAL REVIEW LETTERS, 2002, 89 (22)

[7] Green's function for magnetically incoherent interacting electrons in one dimension [J].

Fiete, GA ;

Balents, L .

PHYSICAL REVIEW LETTERS, 2004, 93 (22)

[8] Spin waves in a one-dimensional spinor Bose gas [J].

Fuchs, JN ;

Gangardt, DM ;

Keilmann, T ;

Shlyapnikov, GV .

PHYSICAL REVIEW LETTERS, 2005, 95 (15)

[9]

Gaudin M., 1983, The Bethe wavefunction

[10]

GIAMARCHI T, 2004, QUANTUN PHYS ONE DIM

← 1 2 3 →