Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Acta Automatica Sinica

Control Decoherence by Quantum Generalized Measurement

Zhang, Ming Ming, GScan OÜ, Bao-Quan, Dai, Hong-Yi, Hu, De-Wen

Published Jan 1, 2008• 2 citations
OpenAlex

Abstract

这份报纸探索由联系量与 decoherence 作斗争的潜力有 decoherence 免费的 subspaces (DFS ) 的概括测量。联系量概括了 subspace 投影机测量(QGSPM ) ，量与操作员条件概括了盒子投影机测量(QGCPM ) 因为 DFS 将提高压制 decoherence 的能力因为 Markovian 和 non-Markovian 打开量系统，这被表明。量测量能被认为是一个工具操作量状态，这被强调。因为协调控制哈密尔顿能积极地被设计，这个方法是有益的。

Related papers

State transfer based on decoherence-free target state by Lyapunov-based control

Jie Jie, Yang, Shuang +1 more

我们基于 decoherence 免费的目标状态为州的转移建议一条基于 Lyapunov 的控制途径。期望的目标状态被构造由一块外部激光地是在 decoherence 免费的 subspace (DFS ) 的一个 decoherence 免费的状态我以便系统状态能是从环境，和没有更多的 decoherence 过程的 decoupled 将发生。与 decoherence 免费的目标状态，我们设计基于 Lyapunov 的控制域尽可能完全驾驶给定的起始的状态到开的量系统的 decoherence 免费的状态的 II，和 decouple 从环境的系统状态同时。最后，设计的州的转移控制在一种类型上实现，这被验证没有联合到环境，四水平的原子系统，和系统能在 decoherence 免费的目标状态上留下来。

Journal of Control Theory and Applications•Jan 1, 2012•0 citations

Rapid Lyapunov control for decoherence-free subspaces of Markovian open quantum systems

Mengxi Chen, Sen Kuang, Shuang Cong

Journal of the Franklin Institute•Oct 19, 2016•21 citations

Controllable Subspaces of Open Quantum Dynamical Systems

Zhang, Ming Ming, Dai Dai +7 more

这篇论文为开的量讨论可控制的潜水艇空格的概念动态系统。有在开的量系统上执行开环的协调控制的能力的 decoherence 免费的潜水艇空格的联合结构的特征将允许 decoherence 免费的潜水艇空格可控制，这积极地被表明。这与观察相对照动态系统不是的那开的量开环可控制。到某个程度，这篇论文给其他的控制 decoherence 免费的潜水艇空格为什么能为量计算是有用的理论解释。

理论物理通讯：英文版•Jan 1, 2008•3 citations

Quantum Generalized Subspace Projector Measurement and Measurement Induced Entanglement

Ming Zhang, Dong Guo-Hua, Hong‐Yi Dai +1 more

We propose the concept of the quantum generalized subspace projector measurement (QGSPM). The distinguished properties of QGSPM is revealed: no matter what the state of the system is prior to the measurement and what the measured result occurs, the state posterior to the measurement can be collapsed onto the specified subspace. Subsequently, the quantum generalized case-projector measurement (QGCPM), as a special case of QGSPM, is also discussed carefully. It is demonstrated that no matter what measured result occurs, the state of the system posterior to QGCPM can be collapsed into one of pure states. Consequently, QGCPM can be used to generate the maximally entangled pure states for multiple particles. As illustrative examples, several concrete methods of generating entanglement are proposed for two two-level particles. It is found that the maximally entangled pure states of two 2-level particles can be generated just by a single QGCPM and the corresponding QGCPM operators are physically realizable in principle if an ancillary four-dimensional quantum system can be introduced.

Chinese Physics Letters•Apr 28, 2006•2 citations

Control Decoherence by Quantum Generalized Measurement

Ming Zhang, Bao-Quan Ou, Hong‐Yi Dai +1 more

Acta Automatica Sinica•Apr 1, 2008•3 citations

QEC-C III: Correlation-Adaptive Hybrid Quantum Error Correction with Decoherence-Free Subspace Inner Encoding and Renewal-Gated Decoding

Ethan Arthur Caspian

Correlated and non-Markovian noise can defeat stabilizer-code performance even when average error rates are low. We propose QEC-C III, a correlation-adaptive hybrid protocol that filters collective dephasing components via an inner dual-rail decoherence-free subspace (DFS) and corrects residual local faults with an outer stabilizer code. To interface DFS mismatch with the outer code in a measurable way, we derive a per-round encoded dephasing probability pZ L (∆t) in terms of experimentally accessible quantities, enabling direct calibration by encoded Ramsey/echo experiments. We introduce a renewal-gated syndrome protocol that segments data into syndrome-defined epochs; under a regenerative assumption it yields a consistent estimator of a per-round logical failure rate and supplies practical diagnostics when the assumption breaks. Finally, we provide a DFS-preserving railsymmetrization primitive that averages rail-dependent coherent errors during parity-check extraction. HEOM simulations validate DFS invariance under strongly non-Markovian collective dephasing and quantify robustness under controlled symmetry breaking.

•Feb 20, 2026•0 citations
这份报纸探索由联系量与 decoherence 作斗争的潜力有 decoherence 免费的 subspaces (DFS ) 的概括测量。联系量概括了 subspace 投影机测量(QGSPM ) ，量与操作员条件概括了盒子投影机测量(QGCPM ) 因为 DFS 将提高压制 decoherence 的能力因为 Markovian 和 non-Markovian 打开量系统，这被表明。量测量能被认为是一个工具操作量状态，这被强调。因为协调控制哈密尔顿能积极地被设计，这个方法是有益的。
我们基于 decoherence 免费的目标状态为州的转移建议一条基于 Lyapunov 的控制途径。期望的目标状态被构造由一块外部激光地是在 decoherence 免费的 subspace (DFS ) 的一个 decoherence 免费的状态我以便系统状态能是从环境，和没有更多的 decoherence 过程的 decoupled 将发生。与 decoherence 免费的目标状态，我们设计基于 Lyapunov 的控制域尽可能完全驾驶给定的起始的状态到开的量系统的 decoherence 免费的状态的 II，和 decouple 从环境的系统状态同时。最后，设计的州的转移控制在一种类型上实现，这被验证没有联合到环境，四水平的原子系统，和系统能在 decoherence 免费的目标状态上留下来。
We propose the concept of the quantum generalized subspace projector measurement (QGSPM). The distinguished properties of QGSPM is revealed: no matter what the state of the system is prior to the measurement and what the measured result occurs, the state posterior to the measurement can be collapsed onto the specified subspace. Subsequently, the quantum generalized case-projector measurement (QGCPM), as a special case of QGSPM, is also discussed carefully. It is demonstrated that no matter what measured result occurs, the state of the system posterior to QGCPM can be collapsed into one of pure states. Consequently, QGCPM can be used to generate the maximally entangled pure states for multiple particles. As illustrative examples, several concrete methods of generating entanglement are proposed for two two-level particles. It is found that the maximally entangled pure states of two 2-level particles can be generated just by a single QGCPM and the corresponding QGCPM operators are physically realizable in principle if an ancillary four-dimensional quantum system can be introduced.
Correlated and non-Markovian noise can defeat stabilizer-code performance even when average error rates are low. We propose QEC-C III, a correlation-adaptive hybrid protocol that filters collective dephasing components via an inner dual-rail decoherence-free subspace (DFS) and corrects residual local faults with an outer stabilizer code. To interface DFS mismatch with the outer code in a measurable way, we derive a per-round encoded dephasing probability pZ L (∆t) in terms of experimentally accessible quantities, enabling direct calibration by encoded Ramsey/echo experiments. We introduce a renewal-gated syndrome protocol that segments data into syndrome-defined epochs; under a regenerative assumption it yields a consistent estimator of a per-round logical failure rate and supplies practical diagnostics when the assumption breaks. Finally, we provide a DFS-preserving railsymmetrization primitive that averages rail-dependent coherent errors during parity-check extraction. HEOM simulations validate DFS invariance under strongly non-Markovian collective dephasing and quantify robustness under controlled symmetry breaking.