Staliunas Kestutis, Longhi Stefano, De Valcárcel Germán J
Physikalisch Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany.
Phys Rev Lett. 2002 Nov 18;89(21):210406. doi: 10.1103/PhysRevLett.89.210406. Epub 2002 Nov 4.
Temporal periodic modulation of the interatomic s-wave scattering length in Bose-Einstein condensates is shown to excite subharmonic patterns in the atom density through a parametric resonance. The dominant wavelength of the spatial structures is primarily selected by the excitation frequency but also affected by the depth of the spatial modulation via a nonlinear resonance. These phenomena represent analogues of the Faraday patterns excited in vertically vibrated liquids.
研究表明，玻色 - 爱因斯坦凝聚体中原子间s波散射长度的时间周期性调制通过参量共振激发原子密度中的次谐波模式。空间结构的主导波长主要由激发频率选择，但也会通过非线性共振受到空间调制深度的影响。这些现象类似于在垂直振动液体中激发的法拉第模式。
