Yang Yang, Chapman Robert J, Haylock Ben, Lenzini Francesco, Joglekar Yogesh N, Lobino Mirko, Peruzzo Alberto
Quantum Photonics Laboratory and Centre for Quantum Computation and Communication Technology, RMIT University, Melbourne, VIC, 3000, Australia.
ETH Zurich, Optical Nanomaterial Group, Institute for Quantum Electronics, Department of Physics, 8093, Zurich, Switzerland.
Nat Commun. 2024 Jan 2;15(1):50. doi: 10.1038/s41467-023-44185-z.
Waveguide lattices offer a compact and stable platform for a range of applications, including quantum walks, condensed matter system simulation, and classical and quantum information processing. However, to date, waveguide lattice devices have been static and designed for specific applications. We present a programmable waveguide array in which the Hamiltonian terms can be individually electro-optically tuned to implement various Hamiltonian continuous-time evolutions on a single device. We used a single array with 11 waveguides in lithium niobate, controlled via 22 electrodes, to perform a range of experiments that realized the Su-Schriffer-Heeger model, the Aubrey-Andre model, and Anderson localization, which is equivalent to over 2500 static devices. Our architecture's micron-scale local electric fields overcome the cross-talk limitations of thermo-optic phase shifters in other platforms such as silicon, silicon-nitride, and silica. Electro-optic control allows for ultra-fast and more precise reconfigurability with lower power consumption, and with quantum input states, our platform can enable the study of multiple condensed matter quantum dynamics with a single device.
波导晶格为一系列应用提供了一个紧凑且稳定的平台，包括量子行走、凝聚态物质系统模拟以及经典和量子信息处理。然而，迄今为止，波导晶格器件一直是静态的，并且是为特定应用而设计的。我们展示了一种可编程波导阵列，其中哈密顿量项可以通过电光单独调谐，以在单个器件上实现各种哈密顿量连续时间演化。我们使用了一个在铌酸锂中具有11个波导的单阵列，通过22个电极进行控制，来进行一系列实验，实现了Su-Schriffer-Heeger模型、Aubrey-Andre模型以及安德森局域化，这相当于超过2500个静态器件。我们架构的微米级局部电场克服了其他平台（如硅、氮化硅和二氧化硅）中热光移相器的串扰限制。电光控制允许以更低的功耗实现超快速和更精确的可重构性，并且对于量子输入态，我们的平台可以用单个器件实现对多种凝聚态物质量子动力学的研究。
