Debnath S, Linke N M, Wang S-T, Figgatt C, Landsman K A, Duan L-M, Monroe C
Joint Quantum Institute, Department of Physics, and Joint Center for Quantum Information and Computer Science, University of Maryland, College Park, Maryland 20742, USA.
Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
Phys Rev Lett. 2018 Feb 16;120(7):073001. doi: 10.1103/PhysRevLett.120.073001.
The local phonon modes in a Coulomb crystal of trapped ions can represent a Hubbard system of coupled bosons. We selectively prepare single excitations at each site and observe free hopping of a boson between sites, mediated by the long-range Coulomb interaction between ions. We then implement phonon blockades on targeted sites by driving a Jaynes-Cummings interaction on individually addressed ions to couple their internal spin to the local phonon mode. The resulting dressed states have energy splittings that can be tuned to suppress phonon hopping into the site. This new experimental approach opens up the possibility of realizing large-scale Hubbard systems from the bottom up with tunable interactions at the single-site level.
捕获离子的库仑晶体中的局域声子模式可以表示一个耦合玻色子的哈伯德系统。我们在每个位点选择性地制备单激发，并观察到玻色子在位点之间的自由跳跃，这是由离子之间的长程库仑相互作用介导的。然后，我们通过在单独寻址的离子上驱动Jaynes-Cummings相互作用，将其内部自旋与局域声子模式耦合，从而在目标位点上实现声子阻塞。由此产生的缀饰态具有可调节的能量分裂，以抑制声子跳入该位点。这种新的实验方法为从单一位点水平上具有可调相互作用的自下而上实现大规模哈伯德系统开辟了可能性。
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