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arXiv 2209.12428quant-phcond-mat.str-elhep-lat
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通过局部纠错增强拓扑序的探测

Enhancing Detection of Topological Order by Local Error Correction

Iris Cong, Nishad Maskara, Minh C. Tran, Hannes Pichler, Giulia Semeghini, Susanne F. Yelin, Soonwon Choi, Mikhail D. Lukin

AI总结:

本文提出局部纠错修饰(LED)方法,将纠错与重整化群流结合,用于在噪声条件下高效稳健地探测拓扑序,并在环面码模拟、里德伯原子量子自旋液体实验及非阿贝尔拓扑相中验证其有效性。

摘要:

对物质拓扑有序态的探索是物理科学多个子领域交叉地带的一个长期目标。这类态具有长程纠缠、涌现规范场和非局域关联等引人入胜的物理性质,并且有助于实现可扩展的容错量子计算。然而,这些相同的特性也使得拓扑有序态的制备、探测和表征尤为困难。受近期实验演示的启发,我们引入了一种用于量化拓扑态的新范式——局部纠错修饰(LED)——它将纠错方法与重整化群流的思想相结合。我们的方法能够高效且稳健地识别拓扑序,并且适用于存在非相干噪声源的情形,这使其特别适合现实实验。我们通过对环面码在多种扰动下的数值模拟展示了LED的能力。随后,我们将其应用于一个实验实现,为在里德伯原子模拟器上产生的量子自旋液体提供了新的见解。最后,我们将LED推广到一般的拓扑相,包括具有非阿贝尔序的拓扑相。

英文摘要:

The exploration of topologically-ordered states of matter is a long-standing goal at the interface of several subfields of the physical sciences. Such states feature intriguing physical properties such as long-range entanglement, emergent gauge fields and non-local correlations, and can aid in realization of scalable fault-tolerant quantum computation. However, these same features also make creation, detection, and characterization of topologically-ordered states particularly challenging. Motivated by recent experimental demonstrations, we introduce a new paradigm for quantifying topological states -- locally error-corrected decoration (LED) -- by combining methods of error correction with ideas of renormalization-group flow. Our approach allows for efficient and robust identification of topological order, and is applicable in the presence of incoherent noise sources, making it particularly suitable for realistic experiments. We demonstrate the power of LED using numerical simulations of the toric code under a variety of perturbations. We subsequently apply it to an experimental realization, providing new insights into a quantum spin liquid created on a Rydberg-atom simulator. Finally, we extend LED to generic topological phases, including those with non-abelian order.

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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