论文标题
使用化合物原子 - 离子系统对扩展极化模型进行量子模拟
Quantum simulation of extended polaron models using compound atom-ion systems
论文作者
论文摘要
我们考虑使用与超电原子气体相互作用的捕获激光冷却离子的混合平台，使用杂交平台表现出强烈的电子 - 音波耦合的量子模拟前景。该系统自然可以摆质声子结构，与通常由超电原子使用的标准光学晶格方案相反，在该方案中，激光光生成晶格，因此它仍然静态。我们得出了描述通用系统的有效哈密顿量，并讨论了所产生的能量尺度，将结果与常用的扩展哈伯德 - 霍尔斯坦模型有关。尽管对于一个典型的实验现实系统，与声音的耦合相结合很小，但我们提供了增强其作用并通过竞争订单达到有趣的制度的手段。扩展的lang-firsov转化揭示了原子之间通过声子诱导的远程相互作用的出现，这可以引起局部和扩展的双波隆状态，其有效质量较低，表明了费米昂配对的可能性。
We consider the prospects for quantum simulation of condensed matter models exhibiting strong electron-phonon coupling using a hybrid platform of trapped laser-cooled ions interacting with an ultracold atomic gas. This system naturally posesses a phonon structure, in contrast to the standard optical lattice scenarios usually employed with ultracold atoms in which the lattice is generated by laser light and thus it remains static. We derive the effective Hamiltonian describing the general system and discuss the arising energy scales, relating the results to commonly employed extended Hubbard-Holstein models. Although for a typical experimentally realistic system the coupling to phonons turns out to be small, we provide the means to enhance its role and reach interesting regimes with competing orders. Extended Lang-Firsov transformation reveals the emergence of phonon-induced long-range interactions between the atoms, which can give rise to both localized and extended bipolaron states with low effective mass, indicating the possibility of fermion pairing.
