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arXiv 2403.14656quant-ph
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稳定规范理论的量子模拟器以抵御 $1/f$ 噪声

Stabilizing Quantum Simulators Of Gauge Theories Against $1/f$ Noise

Bhavik Kumar

AI总结:

本论文研究量子模拟器中规范理论的模拟,证明基于线性规范保护的方案能有效抑制 $1/f^β$ 噪声引起的非相干误差,稳定规范不变性等关键特征,适用于现代模拟和数字 NISQ 设备。

摘要:

本工作研究了量子模拟在当前“第二次”量子革命中的应用,该革命利用各种人工量子物质平台(如光晶格中的超冷原子、Rydberg原子和超导量子比特),以高精度和高控制性实现新奇的凝聚态和粒子物理现象。规范理论在现代量子模拟器中备受关注,因为它们在低能量台式设备上提供了探测高能物理的新途径。然而,要在量子模拟器上准确建模规范理论现象,稳定底层规范对称性至关重要。通过本论文,我们证明了一种最近开发的、基于线性规范保护的实验可行方案(最初旨在防止相干规范破缺误差),也可用于抑制由各种量子模拟平台中突出的 $1/f^β$ 噪声引起的非相干误差。引入了 Bloch-Redfield 形式,在给定环境的噪声功率谱下,对由这些非相干误差引起的规范违反进行建模。本文展示了线性规范保护在稳定量子模拟器中规范理论显著特征(如规范不变性,以及聚焦于无序局域化的新奇远离平衡现象和量子多体疤痕)以抵御 $1/f^β$ 噪声源方面的有效性。这些结果可直接应用于现代模拟量子模拟器和数字 NISQ 设备,为格点规范理论量子模拟领域的进一步发展铺平了道路。

英文摘要:

This work investigates the application of quantum simulation in the ongoing "second" quantum revolution, which employs various synthetic quantum matter platforms, such as ultracold atoms in optical lattices, Rydberg atoms, and superconducting qubits, to realize exotic condensed matter and particle physics phenomena with high precision and control. Gauge theories are of particular interest in modern quantum simulators as they offer a new probe of high-energy physics on low-energy tabletop devices. However, to accurately model gauge-theory phenomena on a quantum simulator, stabilizing the underlying gauge symmetry is crucial. Through this thesis we demonstrate that a recently developed experimentally feasible scheme based on linear gauge protection, initially devised to protect against coherent gauge breaking errors, can also be used to suppress incoherent errors arising from $1/f^β$ noise prominent in various quantum simulation platforms. The Bloch-Redfield formalism is introduced to model gauge violations arising due to these incoherent errors given the noise power spectrum of the environment. The efficacy of linear gauge protection in stabilizing salient features of gauge theories in quantum simulators, such as gauge invariance and exotic far from equilibrium phenomenon focusing on disorder-free localization, and quantum many-body scars against $1/f^β$ noise sources, is illustrated. These results are immediately applicable in modern analog quantum simulators and digital NISQ devices, paving the way for further development in the field of quantum simulation of lattice gauge theories.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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