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Consistency of the unconventional view of de Sitter space as a quantum theory of gravity with a finite number of degrees of freedom requires that Coleman-De Luccia tunneling rates to vacua with negative cosmological constant should be…

高能物理 - 理论 · 物理学 2016-07-07 José R. Espinosa , Jean-François Fortin , Maxime Trépanier

Studies in string theory and in quantum gravity suggest the existence of a finite lower bound to the possible resolution of lengths which, quantum theoretically, takes the form of a minimal uncertainty in positions $\Delta x_0$. A finite…

高能物理 - 理论 · 物理学 2014-11-18 Achim Kempf

Fluid instabilities arise in a variety of contexts and are often unwanted results of engineering imperfections. In one particular model for a magnetized target fusion reactor, a pressure wave is propagated in a cylindrical annulus comprised…

流体动力学 · 物理学 2017-04-26 Michael Lindstrom

In this paper we prove the nonlinear orbital stability of a large class of steady states solutions to the Hamiltonian Mean Field (HMF) system with a Poisson interaction potential. These steady states are obtained as minimizers of an energy…

偏微分方程分析 · 数学 2017-09-12 Marine Fontaine , Mohammed Lemou , Florian Méhats

We study a stabilization problem of linear uncertain systems with parametric uncertainties via feedback control over data-rate-constrained channels. The objective is to find the limitation on the amount of information that must be conveyed…

系统与控制 · 计算机科学 2014-05-26 Kunihisa Okano , Hideaki Ishii

We consider dynamical stabilization of Bose-Einstein condensates (BEC) by time-dependent modulation of the scattering length. The problem has been studied before by several methods: Gaussian variational approximation, the method of moments,…

其他凝聚态物理 · 物理学 2013-05-29 Alexander Itin , Shinichi Watanabe , Toru Morishita

The main concern of this paper is to study large-time behavior of the sheath to the full Euler-Poisson system. As is well known, the monotone stationary solution under the Bohm criterion can be referred to as the sheath which is formed by…

偏微分方程分析 · 数学 2024-03-18 Yao Lei , Yin Haiyan , Zhu Mengmeng

Algorithmic stability is a key characteristic to ensure the generalization ability of a learning algorithm. Among different notions of stability, \emph{uniform stability} is arguably the most popular one, which yields exponential…

机器学习 · 计算机科学 2021-07-14 Zhun Deng , Hangfeng He , Weijie J. Su

In the companion paper, we measured homology classes and computed the optimal homology basis. This paper addresses two related problems, namely, localization and stability. We localize a class with the cycle minimizing a certain objective…

计算几何 · 计算机科学 2011-11-10 Chao Chen , Daniel Freedman

The properties of a partially ionized plasma in a long cylindrical tube subject to a uniform axial electric field are investigated. The plasma is maintained by an external ionizing source balanced by bulk and surface recombinations.…

等离子体物理 · 物理学 2009-10-30 Joel L. Lebowitz , Alexander Rokhlenko

We stabilize a prescribed cycle or an equilibrium of the difference equation using pulsed stochastic control. Our technique, inspired by the Kolmogorov's Law of Large Numbers, activates a stabilizing effect of stochastic perturbation and…

动力系统 · 数学 2020-12-22 Elena Braverman , Conall Kelly , Alexandra Rodkina

A system of stochastic differential equations for the velocity and density of a classical self-gravitating matter is investigated by means of the field theoretic renormalization group. The existence of two types of large-scale scaling…

天体物理学 · 物理学 2009-11-10 N. V. Antonov

In this paper, we establish the stability of the quasineutral limit for the ionic Vlasov-Poisson system under perturbations exponentially small in Wasserstein sense. Notably, we emphasize that exponential smallness is a necessary condition…

偏微分方程分析 · 数学 2024-03-08 Megan Griffin-Pickering , Mikaela Iacobelli

Self-testing is a phenomenon where the use of specific quantum states or measurements can be inferred solely from the correlations they generate. We introduce a universal method for conducting robustness analysis in the self-testing of…

量子物理 · 物理学 2026-03-23 Shin-Liang Chen , Nikolai Miklin

Stability is a key property of both forward models and inverse problems, and depends on the norms considered in the relevant function spaces. For instance, stability estimates for hyperbolic partial differential equations are often based on…

偏微分方程分析 · 数学 2026-04-13 Rima Alaifari , Giovanni S. Alberti , Tandri Gauksson

In this study, we propose new global stabilization approaches for a class of polynomial systems in both model-based and data-driven settings. The existing model-based approach guarantees global asymptotic stability of the closed-loop system…

最优化与控制 · 数学 2025-05-21 Huayuan Huang , M. Kanat Camlibel , Raffaella Carloni , Henk J. van Waarde

By performing an ensemble of molecular dynamics simulations, the model-dependent ionisation state is computed for strongly interacting systems self-consistently. This is accomplished through a free energy minimisation framework based on the…

等离子体物理 · 物理学 2025-01-17 Daniel Plummer , Pontus Svensson , Dirk O. Gericke , Patrick Hollebon , Sam M. Vinko , Gianluca Gregori

Lyapunov functions are popularly used to investigate the stabilization problem of systems of hyperbolic conservation laws with boundary controls. In real life applications often not every boundary value can be observed. In this work, we…

最优化与控制 · 数学 2025-01-28 Mapundi Kondwani Banda , Jan Friedrich , Michael Herty

Stability is a fundamental concept that refers to a system's ability to return close to its original state after disturbances. The minimal conditions for stability when system parameters vary in time, though common in physics, have been…

混沌动力学 · 物理学 2026-05-22 Arnaud Lazarus , Emmanuel Trélat

Our recent interest is focused on establishing the necessary and sufficient conditions that guarantee a long-term stable evolution of both natural and artificial systems. Two necessary conditions, called global and local boundedness, are…

统计力学 · 物理学 2007-05-23 Maria K. Koleva , L. A. Petrov