首页/论文/2201.02723

arXiv 2201.027232022-01hep-thquant-ph

混合态自由QFT中量子信息的信道诱导动力学

Channel induced dynamics of quantum information in mixed state free QFTs

Michal Baczyk

备注：: 13 pages, 6 figures
DOI：: 10.1103/PhysRevD.108.016008

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

摘要英文摘要相关论文

AI总结：

本研究提出将场激发表示为量子信道的QFT研究框架，针对两种通用态验证方案机制，研究两类玻色高斯信道作用，并通过计算量子熵与保真度量化信道特性及诱导动力学。

摘要：

我们提出了一种用于量子场论（QFT）研究的框架，该框架允许我们将场激发表示为量子信道。我们针对两种通用态展示了所提方案的内部运作机制：一维QFT系统的正则化真空态，以及两个全同自由QFT的格点调控热场双重态（Thermofield Double State）。我们研究了幺正与非幺正玻色高斯信道（包括Petz恢复映射）的作用。为评估并量化信道静态作用与信道诱导动力学的特性，我们计算了量子熵与保真度。

英文摘要：

We propose a framework for Quantum Field Theory (QFT) studies that allows us to represent field excitations as quantum channels. We demonstrate inner-workings of the proposed scheme for two universal states: the regularized vacuum state of a one dimensional QFT system and the lattice-regulated Thermofield Double State of two identical free QFTs. We investigate actions of unitary and non-unitary Bosonic Gaussian channels (including Petz Recovery maps). To evaluate and quantify the character of the channel static action and channel induced dynamics we calculate quantum entropies and fidelities.

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。

阅读原文

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

本文内容

摘要英文摘要相关论文

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。

继续探索

相关论文

Composite operators in $T\bar T$-deformed free QFTs

We study perturbative renormalization of the composite operators in the $T\bar T$-deformed two-dimensional free field theories. The pattern of renormalization for the stress-energy tensor is different in the massive and massless cases. While in the latter case the canonical stress tensor is not renormalized up to high order in the perturbative expansion, in the massive theory there are induced counterterms at linear order. For a massless theory our results match the general formula derived recently in [1].

2021-05-24hep-th

Galois covers of N=2 BPS spectra and quantum monodromy

The BPS spectrum of many 4d N=2 theories may be seen as the (categorical) Galois cover of the BPS spectrum of a different 4d N=2 model. The Galois group G acts as a physical symmetry of the covering N=2 model. The simplest instance is SU(2) SQCD with N_f=2 quarks, whose BPS spectrum is a Z_2-cover of the BPS spectrum of pure SYM. More generally, N=2 SYM with simply--laced gauge group admits Z_k-covers for all k; e.g. the Z_2-cover of SO(8) SYM is SO(8) SYM coupled to two copies of the E_6 Minahan-Nemeshanski SCFT. Galois covers simplify considerably the computation of the BPS spectrum at G-sym…

2015-03-25hep-th

弦构造量子场论中的K理论全局对称性与T对称性

K-theoretic Global Symmetry in String-constructed QFT and T-duality

Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo（东京大学宇宙物理数学研究所（WPI））

本文提出某些弦构造量子场论中的广义对称性由K理论给出，探讨了偶形式和奇形式对称性，并通过例子展示其与T对称性的兼容性。

2026-03-19hep-th

对称理论、威金函数、紧化与全息学

Symmetry Theories, Wigner's Function, Compactification, and Holography

本文提出利用威金函数解释量子场论中对称数据的物理意义，并通过弦紧化和全息系统案例展示其应用。

2025-12-21cond-mat.str-elhep-thquant-ph

反德西特空间中量子场论的F定理

F-theorem for Quantum Field Theories in Anti-de Sitter Space

Yau Mathematical Sciences Center, Tsinghua University（清华大学丘成桐数学科学中心）；Mathematical Institute, University of Oxford（牛津大学数学研究所）；Dipartimento di Fisica, Università di Trieste（的里雅斯特大学物理系）；INFN, Sezione di Trieste（意大利国家核物理研究所的里雅斯特分部）；Department of Physics, Northeastern University（东北大学物理系）；Department of Theoretical Physics, CERN（欧洲核子研究中心理论物理部）

本文提出反德西特空间中量子场论的正则化自由能，并推广了边界F定理到非共形情形，通过实验和证明验证了其单调性，并应用于临界点研究。

2025-12-20hep-th

Bose Condensation and $Z_N$ Symmetry Breaking in the Mixed Model of Induced QCD

The mixed model of the large $ N $ induced QCD, with $ N_f \ll N $ flavors of heavy fermions in fundamental representation, is solved in the local limit. The $ Z_N$ symmetry is broken spontaneously in the large $ N $ limit, evading the Elitzur "no-go" theorem. As a result of this symmetry breaking, there is the Bose condensate of the eigenvalues of the scalar field, proportional to $ \frac{N_f}{N} $. This condensate leads to the mass unit, which goes to zero as fractional power of $ \frac{N_f}{N} $, thus defining the new kind of the local limit of this lattice theory. There is a strong couplin…

1992-09-29hep-lathep-th

更多相关论文收起更多论文

Mixed Model of Induced QCD

The problems with the $Z_N$ symmetry breaking in the induced QCD are analyzed. We compute the Wilson loops in the strong coupling phase, but we do not find the $Z_N$ symmetry breaking, for arbitrary potential. We suggest to bypass this problem by adding to the model a heavy fermion field in a fundamental representation of $ SU(N) $. Remarkably, the model still can be solved exactly by the Rieman-Hilbert method, for arbitrary number $N_f$ of flavors. At $ N_f \ll N \rightarrow \infty $ there is a new regime, with two vacuum densities. The $Z_N$ symmetry breaking density satisfies the linear int…

1992-08-24hep-lathep-th

Dark matter and dark energy induced by condensates

It is shown that the vacuum condensate induced by many phenomena behaves as a perfect fluid which, under particular conditions, has zero or negative pressure. In particular, the condensates of thermal states, of fields in curved space and of mixed particles have been analyzed. It is shown that the thermal states with the cosmic microwave radiation temperature, the Unruh and the Hawking radiations give negligible contributions to the critical energy density of the universe, while the thermal vacuum of the intercluster medium could contribute to the dark matter, together with the vacuum energy o…

2016-08-18hep-th

子维度纠缠熵：从几何-拓扑响应到混合态全息学

Subdimensional Entanglement Entropy: from Geometric-Topological Response to Entanglement-Induced Mixed-State Holography

Sun Yat-sen University（中山大学）；Tsinghua University（清华大学）

研究通过子维度纠缠熵探测几何与拓扑如何塑造量子物质的普遍性质，揭示不同相中子维度纠缠熵的响应差异，并建立混合态对称性与全息学的关系。

2026-10-06cond-mat.stat-mechcond-mat.str-elhep-th

Induced Chern-Simons action on noncommutative torus

We compute a Chern-Simons term induced by the fermions on noncommutative torus interacting with two U(1) gauge fields. For rational noncommutativity θ\propto P/Q we find a new mixed term in the action which involves only those fields which are (2π)/Q periodic, like the fields in a crystal with Q^2 nodes.

2007-02-18hep-th

应力张量变形场论的几何实现

Geometric realization of stress-tensor deformed field theory

Center for Theoretical Physics and College of Physics, Jilin University（吉林大学理论物理中心及物理学院）；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）；Max Planck Institute for Gravitational Physics (Albert Einstein Institute)（马克斯·普朗克引力物理研究所（阿尔伯特·爱因斯坦研究所））

本文通过半经典框架将应力张量变形的量子场论重新组织为引力作用在度规极值点上，展示了应力张量流与引力动力学的双向联系，通过两种互补途径建立变形场论与引力作用的关联。

2026-03-09gr-qchep-th

Faithful nonclassicality indicators and extremal quantum correlations in two-qubit states

The state disturbance induced by locally measuring a quantum system yields a signature of nonclassical correlations beyond entanglement. Here we present a detailed study of such correlations for two-qubit mixed states. To overcome the asymmetry of quantum discord and the unfaithfulness of measurement-induced disturbance (severely overestimating quantum correlations), we propose an ameliorated measurement-induced disturbance as nonclassicality indicator, optimized over joint local measurements, and we derive its closed expression for relevant two-qubit states. We study its analytical relation w…

2011-08-19cond-mat.otherhep-thmath-ph