论文标题
在相互作用的激发态歧管中，通过绝热进化的快速多量门门
Fast multi-qubit gates by adiabatic evolution in interacting excited state manifolds
论文作者
论文摘要
量子计算和量子模拟可以通过串联的一分门和相互作用来实现。但是，对于大多数物理实现，探索偏离这种通用范式的状态组件和交互可能是有利的，并为系统上更高级操作提供更快或更强大的访问。在本文中，我们表明，沿激励交流的深色本征境的绝热通道可用于实现快速的多Qubit Toffoli（C $ _K $ -NOT）和Fan-Out（C-Not $^k $）盖茨。可以通过将原子与rydberg水平同时激发（具有共振交换相互作用）来实现这种机制。我们的理论估计值和数值模拟表明，这些多Quibit Rydberg大门的可能性是可能的，最多可容纳20 QUAT，低于1％。激发交换机制在实验平台之间无处不在，我们表明可以在超导电路中实现类似的多量门门。
Quantum computing and quantum simulation can be implemented by concatenation of one- and two-qubit gates and interactions. For most physical implementations, however, it may be advantageous to explore state components and interactions that depart from this universal paradigm and offer faster or more robust access to more advanced operations on the system. In this article, we show that adiabatic passage along the dark eigenstate of excitation exchange interactions can be used to implement fast multi-qubit Toffoli (C$_k$-NOT) and fan-out (C-NOT$^k$) gates. This mechanism can be realized by simultaneous excitation of atoms to Rydberg levels, featuring resonant exchange interaction. Our theoretical estimates and numerical simulations show that these multi-qubit Rydberg gates are possible with errors below 1% for up to 20 qubits. The excitation exchange mechanism is ubiquitous across experimental platforms and we show that similar multi-qubit gates can be implemented in superconducting circuits.
