两组分玻色-爱因斯坦凝聚体上Rosen-Zener脉冲的非线性Ramsey干涉
Nonlinear Ramsey interferometry with the Rosen-Zener pulses on a two-component Bose-Einstein condensate
摘要：
提出了一种可行的方案，实现了利用二分量玻色-爱因斯坦凝聚体的非线性Ramsey干涉，其中非线性来自于相干原子间的相互作用.在我们的方案中，两个Rosen-Zener脉冲被一个持续时间可变的中间保持周期分开，通过改变保持周期，我们在时域中观察到了很好的Ramsey干涉图案。与标准的Ramsey条纹相比，我们的非线性Ramsey图案显示了归因于非线性和不对称性的相互作用的多样结构。特别地，我们发现非线性Ramsey条纹的频率准确地反映了非线性的强度以及系统的非对称性。我们的发现表明非线性Ramsey干涉术在标定原子参数如散射长度和能谱方面有潜在的应用。
英文摘要：
We propose a feasible scheme to realize nonlinear Ramsey interferometry with a two-component Bose-Einstein condensate, where the nonlinearity arises from the interaction between coherent atoms. In our scheme, two Rosen-Zener pulses are separated by an intermediate holding period of variable duration and through varying the holding period we have observed nice Ramsey interference patterns in time domain. In contrast to the standard Ramsey fringes our nonlinear Ramsey patterns display diversiform structures ascribed to the interplay of the nonlinearity and asymmetry. In particular, we find that the frequency of the nonlinear Ramsey fringes exactly reflects the strength of nonlinearity as well as the asymmetry of system. Our finding suggests a potential application of the nonlinear Ramsey interferometry in calibrating the atomic parameters such as scattering length and energy spectrum.
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