Shao-Kai Jian

Effective Field Theory of Operator Scrambling from Strong-to-Weak Symmetry Breaking

B. Cheng, Shao-Kai Jian, Zhi-Cheng Yang

Operator scrambling is commonly diagnosed by the growth of out-of-time-ordered correlators (OTOCs), yet a general symmetry principle underlying their effective dynamics has remained elusive. For Brownian or short-time-correlated large-$N$ Majorana systems, we develop a symmetry-based effective field theory for operator scrambling, organized …

Effective Field Theory of Operator Scrambling from Strong-to-Weak Symmetry Breaking

B. Cheng, Shao-Kai Jian, Zhi-Cheng Yang

Operator scrambling is commonly diagnosed by the growth of out-of-time-ordered correlators (OTOCs), yet a general symmetry principle underlying their effective dynamics has remained elusive. For Brownian or short-time-correlated large-$N$ Majorana systems, we develop a symmetry-based effective field theory for operator scrambling, organized …

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Boundary Criticality at the Nishimori Multicritical Point

Anonymous, Xinyu Sun, Shao-Kai Jian

We study boundary criticality at the Nishimori multicritical point of the two-dimensional (2D) random-bond Ising model. Using tensor-network methods, we construct a family of microscopic boundary conditions that incorporates both boundary-spin rotation and boundary disorder. We identify three conformal boundary fixed points, …

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Analytic Bootstrap for $O(N)$ Boundary Conformal Field Theories with Interacting Boundaries

Xinyu Sun, Shao-Kai Jian, Hong Yao

We investigate $O(N)$ boundary conformal field theories (BCFTs) with boundary interactions in $d=4-ε$ and $d=3-ε$ employing the analytic bootstrap. By deriving universal constraints on conformal data, we show that infinitely many operator expansions can be expressed in terms of a finite set …

Analytic Bootstrap for $O(N)$ Boundary Conformal Field Theories with Interacting Boundaries

Xinyu Sun, Shao-Kai Jian, Hong Yao

We investigate $O(N)$ boundary conformal field theories (BCFTs) with boundary interactions in $d=4-ε$ and $d=3-ε$ employing the analytic bootstrap. By deriving universal constraints on conformal data, we show that infinitely many operator expansions can be expressed in terms of a finite set …

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Noisy monitored quantum circuits

Shuo Liu, Shao-Kai Jian, Shi-Xin Zhang

Abstract Noisy monitored quantum circuits have emerged as a versatile and unifying framework connecting quantum many-body physics, quantum information, and quantum computation. In this review, we provide a comprehensive overview of recent advances in understanding the dynamics of such circuits, with an …

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Emergent Spacetime Supersymmetry at 2D Fractionalized Quantum Criticality

Zhengzhi Wu, Zhou‐Quan Wan, Shao-Kai Jian, Hong Mei Yao

While experimental evidence for spacetime supersymmetry (SUSY) in particle physics remains elusive, condensed matter systems offer a promising arena for its emergence at quantum critical points (QCPs). Although there have been a variety of proposals for emergent SUSY at symmetry-breaking QCPs, the …

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Quantum Charge-4e Superconductivity and Deconfined Pseudocriticality in the Attractive SU(4) Hubbard Model

Zhou‐Quan Wan, Huan Jiang, Xuan Zou, Shiwei Zhang et autres

Unlike conventional charge-2e superconductors, a charge-4e superconductor exhibits long-range coherence of electron quartets rather than Cooper pairs. Clear zero-temperature realizations of charge-4e superconductivity remain rare. Here, we investigate the zero-temperature phase diagram of the attractive SU(4) Hubbard model with numerically exact, large-scale …

Quantum Charge-4e Superconductivity and Deconfined Pseudocriticality in the Attractive SU(4) Hubbard Model

Zhou‐Quan Wan, Huan Jiang, Xuan Zou, Shiwei Zhang et autres

Unlike conventional charge-2e superconductors, a charge-4e superconductor exhibits long-range coherence of electron quartets rather than Cooper pairs. Clear zero-temperature realizations of charge-4e superconductivity remain rare. Here, we investigate the zero-temperature phase diagram of the attractive SU(4) Hubbard model with numerically exact, large-scale …

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Gapless symmetry-protected topological states in measurement-only circuits

Xue-Jia Yu, Sheng Yang, Shuo Liu, Hai‐Qing Lin et autres

Measurement-only quantum circuits offer a versatile platform for realizing intriguing quantum phases of matter. However, gapless symmetry-protected topological (gSPT) states remain insufficiently explored in these settings. In this Letter, we generalize the notion of gSPT to the critical steady state by investigating …

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Exploring nontrivial topology at quantum criticality on a superconducting processor

Ziqi Tan, Ke Wang, Sheng Yang, Fanhao Shen et autres

The discovery of nontrivial topology in quantum critical states has revised the classification of quantum phase transitions and opened a new direction for exploiting topological phases. However, the experimental investigation of gapless many-body systems is challenging due to the inherent complex quantum …

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Exploring nontrivial topology at quantum criticality on a superconducting processor

Ziqi Tan, Fanhao Shen, Feitong Jin, Xuhao Zhu et autres

The discovery of nontrivial topology in quantum critical states has revised the classification of quantum phase transitions and opened a new direction for exploiting topological phases. However, the experimental investigation of gapless many-body systems is challenging due to the inherent complex quantum …

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