Efficient Multiphoton Sampling of Molecular Vibronic Spectra on a Superconducting Bosonic Processor
Efficient Multiphoton Sampling of Molecular Vibronic Spectra on a Superconducting Bosonic Processor
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DOI：
10.1103/physrevx.10.021060
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发表时间：
2019-08
影响因子：
12.5
通讯作者：
Christopher S. Wang;Jacob C. Curtis;B. Lester;Yaxing Zhang;Yvonne Y Gao;Jessica G. Freeze;V. Batista;P. Vaccaro;I. Chuang;L. Frunzio;Liang Jiang;S. Girvin;R. Schoelkopf
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文献类型：
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作者：
Christopher S. Wang;Jacob C. Curtis;B. Lester;Yaxing Zhang;Yvonne Y Gao;Jessica G. Freeze;V. Batista;P. Vaccaro;I. Chuang;L. Frunzio;Liang Jiang;S. Girvin;R. Schoelkopf
量子系统的高效模拟是发展可控量子机的主要动力因素。对于具有底层玻色子结构的寻址系统，利用自然玻色子平台是有利的。通过线性网络的光学光子可以被配置为执行量子模拟任务，但在线性光学系统中有效地制备和检测光的多光子量子态是具有挑战性的。在这里，我们实验地实现了一个玻色子采样协议，用于在双模超导装置中模拟分子振动光谱[Natural Photonics$\extbf{9}$，615(2015)]。除了在两种模式下实施必要的高斯运算集外，我们还首次在任何平台上演示了一种高保真的单激发光子数分辨检测方案，该方案能够在每个模式下分辨多达15个光子，从而满足了可扩展性要求。此外，我们还练习了合成非高斯输入态的能力，以模拟振动激发态下的分子系综的光谱。我们通过提取H$2$O、O$3$、NO$2$和SO$2$中的光电子过程的光谱，展示了我们实现的可重编程的可编程性。这项工作中强调的能力建立了超导体系结构作为玻色子模拟的一个有前途的平台，并通过将它们与克尔相互作用和工程耗散等工具相结合，使更广泛类别的玻色子系统的模拟成为可能。
The efficient simulation of quantum systems is a primary motivating factor for developing controllable quantum machines. For addressing systems with underlying bosonic structure, it is advantageous to utilize a naturally bosonic platform. Optical photons passing through linear networks may be configured to perform quantum simulation tasks, but the efficient preparation and detection of multiphoton quantum states of light in linear optical systems are challenging. Here, we experimentally implement a boson sampling protocol for simulating molecular vibronic spectra [Nature Photonics $\textbf{9}$, 615 (2015)] in a two-mode superconducting device. In addition to enacting the requisite set of Gaussian operations across both modes, we fulfill the scalability requirement by demonstrating, for the first time in any platform, a high-fidelity single-shot photon number resolving detection scheme capable of resolving up to 15 photons per mode. Furthermore, we exercise the capability of synthesizing non-Gaussian input states to simulate spectra of molecular ensembles in vibrational excited states. We show the re-programmability of our implementation by extracting the spectra of photoelectron processes in H$_2$O, O$_3$, NO$_2$, and SO$_2$. The capabilities highlighted in this work establish the superconducting architecture as a promising platform for bosonic simulations, and by combining them with tools such as Kerr interactions and engineered dissipation, enable the simulation of a wider class of bosonic systems.