Strongly correlated quantum walks with a 12-qubit superconducting processor
Strongly correlated quantum walks with a 12-qubit superconducting processor
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使用 12 量子位超导处理器进行强相关量子行走
DOI：
10.1126/science.aaw1611
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发表时间：
2019-05
期刊：
影响因子：
56.9
通讯作者：
Pan Jian-Wei
中科院分区：
文献类型：
--
作者：
Yan Zhiguang;Zhang Yu-Ran;Gong Ming;Wu Yulin;Zheng Yarui;Li Shaowei;Wang Can;Liang Futian;Lin Jin;Xu Yu;Guo Cheng;Sun Lihua;Peng Cheng-Zhi;Xia Keyu;Deng Hui;Rong Hao;You J. Q.;Nori Franco;Fan Heng;Zhu Xiaobo;Pan Jian-Wei
超导电路上的量子漫步量子漫步产生大规模的量子叠加态。这允许经典不可用的应用，如模拟多体量子系统，并产生比经典计算快得多的量子算法。严等人演示由12个短距离相互作用的超导量子比特组成的一维阵列中一个和两个强关联微波光子的量子行走。超导平台的可扩展性可能导致大规模实施和复杂系统的量子模拟。科学，本期第753页的量子行走是在超导电路上演示的。量子游动是经典随机游动的量子类比，它可以模拟大规模量子多体系统，实现无时间依赖控制的普适量子计算。我们在一个由12个短距离相互作用的超导量子比特组成的一维阵列中实验演示了一个和两个强关联微波光子的量子行走。首先，在单光子量子漫步中，我们观察到了超导量子比特的准粒子激发密度和关联以及量子比特对之间的量子纠缠的传播。其次，当通过激发两个超导量子比特实现双光子量子行走时，我们从测量的含时长程反常关系中观察到了强相互作用光子的费米化，代表了具有吸引相互作用的光子的反聚束。在量子处理器上演示量子行走，使用超导量子比特作为人造原子和层析读出，为多体现象的量子模拟和普遍的量子计算铺平了道路。
Quantum walks on a superconducting circuit Quantum walks generate large-scale quantum superposed states. This allows for classically unavailable applications, such as simulating many-body quantum systems, and also yields quantum algorithms exponentially faster than classical computation. Yan et al. demonstrate quantum walks of one and two strongly correlated microwave photons in a one-dimensional array of 12 superconducting qubits with short-range interactions. The scalability of the superconducting platform could lead to large-scale implementations and the quantum simulation of complex systems. Science, this issue p. 753 Quantum walks are demonstrated on a superconducting circuit. Quantum walks are the quantum analogs of classical random walks, which allow for the simulation of large-scale quantum many-body systems and the realization of universal quantum computation without time-dependent control. We experimentally demonstrate quantum walks of one and two strongly correlated microwave photons in a one-dimensional array of 12 superconducting qubits with short-range interactions. First, in one-photon quantum walks, we observed the propagation of the density and correlation of the quasiparticle excitation of the superconducting qubit and quantum entanglement between qubit pairs. Second, when implementing two-photon quantum walks by exciting two superconducting qubits, we observed the fermionization of strongly interacting photons from the measured time-dependent long-range anticorrelations, representing the antibunching of photons with attractive interactions. The demonstration of quantum walks on a quantum processor, using superconducting qubits as artificial atoms and tomographic readout, paves the way to quantum simulation of many-body phenomena and universal quantum computation.
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