Bader Philipp, Fischer Uwe R
Eberhard-Karls-Universität Tübingen, Institut für Theoretische Physik, D-72076 Tübingen, Germany.
Phys Rev Lett. 2009 Aug 7;103(6):060402. doi: 10.1103/PhysRevLett.103.060402. Epub 2009 Aug 5.
We investigate whether the many-body ground states of bosons in a generalized two-mode model with localized inhomogeneous single-particle orbitals and anisotropic long-range interactions (e.g., dipole-dipole interactions) are coherent or fragmented. It is demonstrated that fragmentation can take place in a single trap for positive values of the interaction couplings, implying that the system is potentially stable. Furthermore, the degree of fragmentation is shown to be insensitive to small perturbations on the single-particle level.
我们研究了在具有局域非均匀单粒子轨道和各向异性长程相互作用（例如偶极-偶极相互作用）的广义双模模型中，玻色子的多体基态是相干的还是碎片化的。结果表明，对于相互作用耦合的正值，碎片化可以在单个陷阱中发生，这意味着系统可能是稳定的。此外，碎片化程度对单粒子水平上的小扰动不敏感。
