论文标题
演示超导量子位之间的可调三体相互作用
Demonstration of tunable three-body interactions between superconducting qubits
论文作者
论文摘要
非平局多量相互作用提供了用于量子信息处理器的有用资源。它们的实施将有助于分子和组合优化问题的更有效的量子模拟，并且可以简化抑制和误差校正方案。在这里，我们提出了一个超导电路结构，其中耦合模块通过设计介导了三个通量码头之间的2局和3个本地相互作用。通过多数脉冲序列来估计哈密顿系统的系统，该序列在系统中所有相邻的激发歧管之间实现Ramsey型干涉测量。通过耦合器通量偏置在几个MHz上连贯地调谐3-局部相互作用，并且可以关闭，这对于在量子退火，模拟量子模拟和栅极模型量子计算中的应用非常重要。
Nonpairwise multi-qubit interactions present a useful resource for quantum information processors. Their implementation would facilitate more efficient quantum simulations of molecules and combinatorial optimization problems, and they could simplify error suppression and error correction schemes. Here we present a superconducting circuit architecture in which a coupling module mediates 2-local and 3-local interactions between three flux qubits by design. The system Hamiltonian is estimated via multi-qubit pulse sequences that implement Ramsey-type interferometry between all neighboring excitation manifolds in the system. The 3-local interaction is coherently tunable over several MHz via the coupler flux biases and can be turned off, which is important for applications in quantum annealing, analog quantum simulation, and gate-model quantum computation.
