Department of Physics, University of Athens, Panepistimiopolis, Zografos, Athens 15784, Greece.
Phys Rev Lett. 2013 Jun 28;110(26):264101. doi: 10.1103/PhysRevLett.110.264101. Epub 2013 Jun 25.
We study matter-wave bright solitons in spin-orbit coupled Bose-Einstein condensates with attractive interactions. We use a multiscale expansion method to identify solution families for chemical potentials in the semi-infinite gap of the linear energy spectrum. Depending on the linear and spin-orbit coupling strengths, the solitons may present either a sech2-shaped or a modulated density profile reminiscent of the stripe phase of spin-orbit coupled repulsive Bose-Einstein condensates. Our numerical results are in excellent agreement with our analytical findings and demonstrate the potential robustness of solitons for experimentally relevant conditions.
我们研究了具有吸引力相互作用的自旋轨道耦合玻色-爱因斯坦凝聚体中的物质波亮孤子。我们使用多尺度展开方法来确定线性能谱半无限间隙中化学势的解族。根据线性和自旋轨道耦合强度，孤子可能呈现 sech2 形状或调制密度分布，类似于自旋轨道耦合排斥玻色-爱因斯坦凝聚体的条纹相。我们的数值结果与我们的分析结果非常吻合，证明了孤子在实验相关条件下的潜在稳健性。
