Many-body dynamics of p -wave Feshbach-molecule production: A mean-field approach
Many-body dynamics of p -wave Feshbach-molecule production: A mean-field approach
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p 波 Feshbach 分子产生的多体动力学：平均场方法
DOI：
10.1103/physreva.87.023610
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发表时间：
2013
影响因子：
2.9
通讯作者：
Austen L
中科院分区：
文献类型：
--
作者：
Austen L
我们研究了在相同内态的费米原子超冷气体中产生波Feshbach分子的平均场动力学。我们推导出一个可分离势来描述这种原子的低能散射特性，并用这个势来求解磁场扫描过程中的平均场动力学。首先，在Feshbach共振的负散射长度一侧，气体被描述为BCS理论。我们采用了SzymańSkaet等人的方法。莱特牧师。94,170402(2005)PRLTAO0031-900710.1103/PhysRevLett.94.170402]到波相互作用的费米气体，并模拟了在线性变化的磁场影响下，气体转化为共振另一侧分子的玻色-爱因斯坦凝聚的动力学。分析了气体密度、温度、磁场初值和磁场斜率对分子生产效率的影响。我们的结果表明，在这个近似下，线性磁场扫描产生的分子高度依赖于初始态。
We study the mean-field dynamics of-wave Feshbach-molecule production in an ultracold gas of Fermi atoms in the same internal state. We derive a separable potential to describe the low-energy scattering properties of such atoms, and use this potential to solve the mean-field dynamics during a magnetic-field sweep. Initially, on the negative scattering length side of a Feshbach resonance the gas is described by the BCS theory. We adapt the method by Szymańskaet al.[Phys. Rev. Lett. 94, 170402 (2005)PRLTAO0031-900710.1103/PhysRevLett.94.170402] to-wave interacting Fermi gases and model the conversion dynamics of the gas into a Bose-Einstein condensate of molecules on the other side of the resonance under the influence of a linearly varying magnetic field. We have analyzed the dependence of the molecule production efficiency on the density of the gas, temperature, initial value of the magnetic field, and magnetic-field ramp speed. Our results show that in this approximation molecule production by a linear magnetic-field sweep is highly dependent on the initial state.