We present a novel classical algorithm designed to learn the stabilizer group -- namely the group of Pauli strings for which a state is a $\pm 1$ eigenvector -- of a given Matrix Product State (MPS). The algorithm is based on a clever and theoretically grounded biased sampling in the Pauli (or Bell) basis. Its output is a set of independent stabilizer generators whose total number is directly associated with the stabilizer nullity, notably a well-established nonstabilizer monotone. We benchmark our method on $T$-doped states randomly scrambled via Clifford unitary dynamics, demonstrating very accurate estimates up to highly-entangled MPS with bond dimension $χ\sim 10^3$. Our method, thanks to a very favourable scaling $\mathcal{O}(χ^3)$, represents the first effective approach to obtain a genuine magic monotone for MPS, enabling systematic investigations of quantum many-body physics out-of-equilibrium.
Complexity and Applications of Nearest Stabilizer Product State Problems
University of California, San Diego(加州大学圣地亚哥分校);Hon Hai (Foxconn) Research Institute(鸿海(富士康)研究院);Institute for Quantum Computing, University of Waterloo(滑铁卢大学量子计算研究所)
Stabilizer Rényi Entropy for Translation-Invariant Matrix Product States
School of Physics, Beihang University(北京航空航天大学物理学院);Institute of Fundamental Physics and Quantum Technology & School of Physical Science and Technology, Ningbo University(宁波大学基础物理与量子技术研究所及物理科学与技术学院);Peng Huanwu Collaborative Center for Research and Education, Beihang University(北京航空航天大学彭桓武科教协同中心)
Complexity of quantum states in the stabilizer formalism
School of Mathematics and Physics, University of Science and Technology Beijing(北京科技大学数学与物理学院);State Key Laboratory of Mathematical Sciences, Academy of Mathematics and Systems Science, Chinese Academy of Sciences(中国科学院数学与系统科学研究院数学科学重点实验室);School of Mathematical Sciences, University of Chinese Academy of Sciences(中国科学院大学数学科学学院)
Stabilizer Ranks, Barnes Wall Lattices and Magic Monotones
Institute for Quantum Computing, University of Waterloo(量子计算研究所,滑铁卢大学);David R. Cheriton School of Computer Science, University of Waterloo(大卫·R·切里顿计算机科学学院,滑铁卢大学);Perimeter Institute for Theoretical Physics(基础物理前沿研究所)
University of Texas at Austin(德克萨斯大学奥斯汀分校);Simons Institute for the Theory of Computing(计算理论学院);Portland State University(波特兰州立大学);Rice University(里奇大学)
A strong converse for stabilizer codes over Pauli channels via the blowing-up lemma
Centre for Quantum Technologies, National University of Singapore(新加坡国立大学量子技术中心);Department of Electrical and Computer Engineering, National University of Singapore(新加坡国立大学电气与计算机工程系)
Clifford-hierarchy stabilizer formalism with applications to twisted quantum doubles
Joint Quantum Institute, NIST/University of Maryland(联合量子研究所,美国国家标准与技术研究院/马里兰大学);Joint Center for Quantum Information and Computer Science, NIST/University of Maryland(量子信息与计算机科学联合中心,美国国家标准与技术研究院/马里兰大学);School of Physics, The University of Sydney(悉尼大学物理学院);Institute for Physical Sciences and Technology, University of Maryland(马里兰大学物理科学与工程技术研究所);Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland(马里兰大学物理系凝聚态理论中心与联合量子研究所)
该文提出 $X\mathcal C^{(k)}_d$ 稳定子形式体系,推广 Pauli 稳定子以涵盖扭曲量子双重模型,证明其可规避 Bravyi-Koenig 界,并展示通过测量该稳定子可确定性制备逻辑魔法态。
Operator algebra and algorithmic construction of boundaries and defects in (2+1)D topological Pauli stabilizer codes
International Center for Quantum Materials, School of Physics, Peking University(北京大学物理学院量子材料国际中心);Center of Mathematical Sciences and Applications, Harvard University(哈佛大学数学科学应用中心);Joint Center for Quantum Information and Computer Science, University of Maryland(马里兰大学量子信息与计算机科学联合中心)
我们证明了低秩矩阵可以有效地恢复从少量的测量,从某一矩阵组的轨道采样。作为一种特殊情况,我们的理论对相位恢复问题进行了说明。在这里,任务是恢复一个向量,只给出它的内积的振幅与少量的向量从轨道。在数学的许多领域中,这个群的变体以不同的名字出现。在编码理论和量子信息中,它是复克利福德群;在时频分析中,它是振子群;在数学物理中,它是亚群。它提供了一个特别小的和高度结构化的轨道,包括和推广离散傅立叶基:虽然傅立叶向量具有常数模量的系数和线性依赖于其指数的相位,但所述轨道中的向量具有二次依赖的相位。在量子信息中,轨道被广泛使用,并被称为稳定态的集合。我们认为,由于其丰富的几何结构和接近最佳的恢复性能,稳定状态形成一个理想的模型,相位恢复的结构化测量。我们的结果适用于$m\geq C κ_r r d \log(d)$测量,其中过采样因子k在$κ_r=1$和$κ_r = r^2$之间变化,取决于轨道。重建对加性噪声和偏离低秩假设都是稳定的。如果感兴趣的矩阵是另外半正定的,则可以通过简单的约束最小二乘回归来执行重建。我们的证明方法可以适用于其他群体的轨道。