The Open University, Walton Hall, Milton Keynes MK7 6AA, United Kingdom.
Phys Rev Lett. 2012 Nov 30;109(22):223001. doi: 10.1103/PhysRevLett.109.223001. Epub 2012 Nov 28.
In condensed matter, it is often difficult to untangle the effects of competing interactions, and this is especially problematic for superconductors. Quantum simulators may help: here we show how exploiting the properties of highly excited Rydberg states of cold fermionic atoms in a bilayer lattice can simulate electron-phonon interactions in the presence of strong correlation--a scenario found in many unconventional superconductors. We discuss the core features of the simulator, and use numerics to compare with condensed matter analogues. Finally, we illustrate how to achieve a practical, tunable implementation of the simulation using "painted spot" potentials.
在凝聚态物质中，通常很难理清竞争相互作用的影响，这对于超导体来说尤其成问题。量子模拟器可能会有所帮助：在这里，我们展示了如何利用冷费米子原子双层晶格中高度激发的里德堡态的性质来模拟强关联下的电子-声子相互作用，这种情况在许多非常规超导体中都有发现。我们讨论了模拟器的核心特点，并使用数值模拟来与凝聚态物质模拟进行比较。最后，我们说明了如何使用“涂斑”势来实现实际的、可调谐的模拟。
