Javanainen Juha, Kostrun Marijan, Zheng Yi, Carmichael Andrew, Shrestha Uttam, Meinel Patrick J, Mackie Matt, Dannenberg Olavi, Suominen Kalle-Antti
Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046, USA.
Phys Rev Lett. 2004 May 21;92(20):200402. doi: 10.1103/PhysRevLett.92.200402. Epub 2004 May 20.
We model collisionless collective conversion of a degenerate Fermi gas of atoms into bosonic molecules via a Feshbach resonance, treating the bosonic molecules as a classical field and seeding the pairing amplitudes with random phases. A dynamical instability of the Fermi sea against association with molecules drives the conversion. The model qualitatively reproduces several experimental observations [Regal et al., Nature (London), (2003)]. We predict that the initial temperature of the Fermi gas sets the limit for the efficiency of atom-molecule conversion.
我们通过费什巴赫共振对简并费米原子气体到玻色分子的无碰撞集体转换进行建模，将玻色分子视为经典场并用随机相位为配对振幅设定初始值。费米海对与分子缔合的动力学不稳定性驱动了这种转换。该模型定性地再现了一些实验观测结果[雷加尔等人，《自然》（伦敦），（2003年）]。我们预测费米气体的初始温度设定了原子 - 分子转换效率的极限。
