The field of quantum simulation, which aims at using a tunable quantum system to simulate another, has been developing fast in the past years as an alternative to the all-purpose quantum computer. So far, most efforts in this domain have been directed to either fully regular or fully chaotic systems. Here, we focus on the intermediate regime, where regular orbits are surrounded by a large sea of chaotic trajectories. We observe a quantum chaos transport mechanism, called chaos-assisted tunneling, that translates in sharp resonances of the tunneling rate and provides previously unexplored possibilities for quantum simulation. More specifically, using Bose-Einstein condensates in a driven optical lattice, we experimentally demonstrate and characterize these resonances. Our work paves the way for quantum simulations with long-range transport and quantum control through complexity.

量子仿真领域的目标是使用可调量子系统来仿真另一个领域，过去几年来，它作为通用量子计算机的替代品发展迅速。到目前为止，该领域的大多数努力都针对完全规则或完全混沌的系统。在这里，我们关注中间状态，其中规则的轨道被一大片混乱的轨道所环绕。我们观察到一种称为混沌辅助隧穿的量子混沌传输机制，该机制转化为隧穿速率的尖锐共振，并为量子模拟提供了以前未曾探索过的可能性。更具体地说，在驱动的光学晶格中使用Bose-Einstein凝聚物，我们通过实验证明并表征了这些共振。