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Variations of loading level and changes in system topological property may cause the operating point of an electric power systems to move gradually towards the verge of its transmission capability, which can lead to catastrophic outcomes…

系统与控制 · 计算机科学 2019-04-19 Bai Cui , Xu Andy Sun

Four-dimensional CDT (causal dynamical triangulations) is a lattice theory of geometries which one might use in an attempt to define quantum gravity non-perturbatively, following the standard procedures of lattice field theory. Being a…

高能物理 - 理论 · 物理学 2020-03-19 J. Ambjorn , D. Coumbe , J. Gizbert-Studnicki , A. Görlich , J. Jurkiewicz

The power system, a fundamental public utility, is increasingly important due to growing global electricity demand. Recent large-scale blackouts (e.g., Iberian Peninsula, UK) have raised concerns about transient stability under impact…

动力系统 · 数学 2026-05-19 Sixu Wu , Chenmin Zhang , Aiqing Zhu , Yang Liu , Jianxi Lin , Yifa Tang

We investigate bias-driven non-equilibrium quantum phase transitions in a paradigmatic quantum-transport setup: an interacting quantum dot coupled to non-interacting metallic leads. Using the Random Phase Approximation, which is exact in…

强关联电子 · 物理学 2026-01-29 José F. B. Afonso , Stefan Kirchner , Pedro Ribeiro

Voltage collapse is a type of blackout-inducing dynamic instability that occurs when power demand exceeds the maximum power that can be transferred through a network. The traditional (preventive) approach to avoid voltage collapse is based…

系统与控制 · 电气工程与系统科学 2021-04-20 Charalampos Avraam , Enrique Mallada

Critical slowing down (CSD) has been a trademark of critical dynamics for equilibrium phase transitions of a many-body system, where the relaxation time for the system to reach thermal equilibrium or quantum ground state diverges with…

量子物理 · 物理学 2023-08-02 Wenqian Zhang , Yadong Wu , Xingze Qiu , Jue Nan , Xiaopeng Li

The critical value of the atom-field coupling strength for a finite number of atoms is deter- mined by means of both, semiclassical and exact solutions. In the semiclassical approach we use a variational procedure with coherent and…

量子物理 · 物理学 2012-12-05 Octavio Castaños , Eduardo Nahmad-Achar , Ramón López-Peña , Jorge G. Hirsch

An autonomous system of ordinary differential equations in the plane with a centre-saddle bifurcation is considered. The influence of time damped perturbations with power-law asymptotics is investigated. The particular solutions tending at…

动力系统 · 数学 2023-10-11 Oskar Sultanov

With the increasing penetration of renewable energy sources, grid-forming (GFM) inverters are becoming essential for voltage and frequency regulation. However, the transient stability of GFM inverter is critically affected by the current…

系统与控制 · 电气工程与系统科学 2026-03-03 Dewan Mahnaaz Mahmud , Vinu Thomas , Bogdan Marinescu , Mickaël Hilairet

A promising direction for harnessing the laws of quantum mechanics to perform quantum computation is the topological quantum computation, for which topological superconductivity is one of the physical platforms. Intensive theoretical…

超导电性 · 物理学 2022-09-05 Noah F. Q. Yuan , Xiao-Jia Chen

We study the effects of symmetry-breaking defects at continuous quantum transitions (CQTs), which may arise from localized external fields coupled to the order-parameter operator. The problem is addressed within renormalization-group (RG)…

统计力学 · 物理学 2022-05-10 Alessio Franchi , Davide Rossini , Ettore Vicari

Two-level atoms interacting with a one mode cavity field at zero temperature have order parameters which reflect the presence of a quantum phase transition at a critical value of the atom-cavity coupling strength. Two popular examples are…

量子物理 · 物理学 2015-06-11 J. G. Hirsch , O. Castaños , E. Nahmad-Achar , R. López-Penã

For the validation of safety-critical systems regarding safety and comfort, e.g., in the context of automated driving, engineers often have to cope with large (parametric) test spaces for which it is infeasible to test through all possible…

软件工程 · 计算机科学 2021-07-02 Daniel Grujic , Tabea Henning , Emilio José Calleja García , Andre Bergmann

Whenever stability of a system is concerned, transient stability is given the highest priority. For analysis purpose transient stability is checked with the help of Critical Clearing Time (CCT). With the continuous growth of Distributed…

系统与控制 · 电气工程与系统科学 2019-10-25 Ferdous Irtiaz Khan , Tareq Aziz

We study critical phenomena of nonequilibrium phase transitions by using the AdS/CFT correspondence. Our system consists of charged particles interacting with a heat bath of neutral gauge particles. The system is in current-driven…

高能物理 - 理论 · 物理学 2018-12-06 Masataka Matsumoto , Shin Nakamura

A critical transition for a system modelled by a concave quadratic scalar ordinary differential equation occurs when a small variation of the coefficients changes dramatically the dynamics, from the existence of an attractor-repeller pair…

动力系统 · 数学 2022-11-21 Iacopo P. Longo , Carmen Núñez , Rafael Obaya

The rising demand of computing power leads to the installation of a large number of Data Centers (DCs). Their Fault-Ride-Through (FRT) behavior and their unique power characteristics, especially for DCs catered to Artificial Intelligence…

系统与控制 · 电气工程与系统科学 2025-05-23 Alberto Jimenez-Ruiz , Federico Milano

In this paper, we discuss a method to find the most influential power system parameters to the probabilistic transient stability assessment problem---finding the probability distribution of the critical clearing time. We perform the…

系统与控制 · 电气工程与系统科学 2020-10-23 Raphael L. V. Fortulan , Luís F. C. Alberto

In this letter, we discuss how thermal fluctuations can effect the stability of (generally) charged black holes when close to certain critical points. Our novel treatment utilizes the black hole area spectrum (which is, for definiteness,…

广义相对论与量子宇宙学 · 物理学 2009-11-10 Gilad Gour , A. J. M. Medved

In exact density functional theory (DFT) the total ground-state energy is a series of linear segments between integer electron points, a condition known as "piecewise linearity". Deviation from this condition is indicative of poor…

其他凝聚态物理 · 物理学 2015-06-22 Vojtěch Vlček , Helen R. Eisenberg , Gerd Steinle-Neumann , Leeor Kronik , Roi Baer