通用逻辑量子光子神经网络处理器,通过腔辅助相互作用

IF 8.3 1区 物理与天体物理 Q1 PHYSICS, APPLIED
Jasvith Raj Basani, Murphy Yuezhen Niu, Edo Waks
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引用次数: 0

摘要

在玻色子模式中编码量子信息为硬件高效和容错的量子信息处理提供了一个有前途的方向。然而,利用原生光子硬件实现对玻色子编码的高保真通用控制仍然是一个重大挑战。我们建立了一个量子控制框架,利用量子光子神经网络来准备和执行任意多模多光子态的通用逻辑运算。我们方法的核心是光学非线性,这是通过与三能级Λ原子系统的强光-物质相互作用实现的。这种被动相互作用的动力学逐渐局限于单模子空间,使确定性纠缠门的构建成为可能,克服了许多非线性光学机构面临的局限性。使用这种非线性作为元素激活函数,我们表明所提出的架构能够确定地制备广泛的多模多光子态,包括必要的资源态。我们通过准备和执行对对称保护纠错码的逻辑运算来演示玻色子编码的通用码不可知控制。我们的架构不受系统哈密顿量(如纯χ(2)和χ(3)过程)下进化所施加的对称性的约束,并且自然适合于在光子逻辑量子位上实现非横向门。此外,我们提出了一种基于非拆除测量的误差校正方案,该方案由光学非线性作为构建块来促进。我们的研究结果为近期能够纠错量子计算的量子光子处理器铺平了道路,并且可以使用当前的集成光子硬件来实现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Universal logical quantum photonic neural network processor via cavity-assisted interactions

Universal logical quantum photonic neural network processor via cavity-assisted interactions

Encoding quantum information within bosonic modes offers a promising direction for hardware-efficient and fault-tolerant quantum information processing. However, achieving high-fidelity universal control over bosonic encodings using native photonic hardware remains a significant challenge. We establish a quantum control framework to prepare and perform universal logical operations on arbitrary multimode multi-photon states using a quantum photonic neural network. Central to our approach is the optical nonlinearity, which is realized through strong light-matter interaction with a three-level Λ atomic system. The dynamics of this passive interaction are asymptotically confined to the single-mode subspace, enabling the construction of deterministic entangling gates and overcoming limitations faced by many nonlinear optical mechanisms. Using this nonlinearity as the element-wise activation function, we show that the proposed architecture is able to deterministically prepare a wide array of multimode multi-photon states, including essential resource states. We demonstrate universal code-agnostic control of bosonic encodings by preparing and performing logical operations on symmetry-protected error-correcting codes. Our architecture is not constrained by symmetries imposed by evolution under a system Hamiltonian such as purely χ(2) and χ(3) processes, and is naturally suited to implement non-transversal gates on photonic logical qubits. Additionally, we propose an error-correction scheme based on non-demolition measurements that is facilitated by the optical nonlinearity as a building block. Our results pave the way for near-term quantum photonic processors that enable error-corrected quantum computation, and can be achieved using present-day integrated photonic hardware.

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来源期刊
npj Quantum Information
npj Quantum Information Computer Science-Computer Science (miscellaneous)
CiteScore
13.70
自引率
3.90%
发文量
130
审稿时长
29 weeks
期刊介绍: The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.
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