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arXiv 0904.4334cond-mat.quant-gas
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光晶格中具有吸引相互作用的自旋1/2费米子

Spin-1/2 fermions with attractive interaction in an optical lattice

O. Fialko, A. Gammal, K. Ziegler

摘要:

我们研究了光晶格中的吸引费米子,它与俘获势叠加,使得费米子可以形成玻色子分子。我们将模型映射到依赖于Nambu-Gor'kov传播子的非线性场方程。由此产生的场方程的数值求解的松弛技术,使我们能够计算费米子和凝聚分子在零温度下的非均匀密度。当费米子之间的相互作用很强时,未结合的费米子和结合的分子之间存在竞争,导致陷阱中心费米子的非均匀密度意外减少。

英文摘要:

We study attractive fermions in an optical lattice superimposed by a trapping potential, such that fermions may form bosonic molecules. We map the model onto nonlinear field equations depending on the Nambu-Gor'kov propagator. The resulting field equations where solved numerically by a relaxation technique that allowed us to calculate the inhomogeneous densities of fermions and condensed molecules at zero temperature. When the interactions between fermions are strong there is a competition between unbound fermions and bound molecules leading to an unexpected reduction of the non-homogeneous density of fermions at the center of the trap.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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