This article deals with the realisation of constraints in underdamped Langevin dynamics via soft-constrained dynamics. Specifically, we study systems with a large (or small) parameter that controls the constraint mechanisms, e.g. the strength of confinement forces, mass or friction coefficients, and we derive quantitative convergence results for both the constrained variables and the softly constrained dynamics on the limiting subspace. The latter can be either a spatial or a momentum or velocity subspace, depending on the underlying soft constraint mechanism; in this paper we treat only holonomic constraints, i.e. all momentum- or velocity-level constraints are integrable. We explicitly include the initial conditions so that it is clear whether they must satisfy the constraint or not in order to realise the desired constrained dynamics. We discuss the implications of these results as well as questions related to the sampling of the corresponding conditional probability measures.
Exponential Contraction for Underdamped Langevin Diffusions with Superlinear Forces
School of Mathematics and Statistics, Lanzhou University（兰州大学数学与统计学院）；School of Mathematics and Statistics, Northeast Normal University（东北师范大学数学与统计学院）；School of Mathematical Sciences, Tiangong University（天津工业大学数学科学学院）
Error estimates between SGD with momentum and underdamped Langevin diffusion
Laboratoire de Mathematiques Blaise Pascal, CNRS-UMR 6620, Universite Clermont-Auvergne（克莱蒙奥弗涅大学）；University of Macau（澳门大学）；UM Zhuhai Research Institute（澳门大学珠海研究院）；School of Mathematical Sciences, Peking University（北京大学数学科学学院）；Beijing International Center for Mathematical Research (BICMR), Peking University（北京大学北京国际数学研究中心）
Ergodicity of the underdamped mean-field Langevin dynamics
Université Paris-Saclay（巴黎萨克雷大学）；Université Paris-Dauphine, PSL（巴黎多芬大学，PSL大学）；The Chinese University of Hong Kong（香港中文大学）；Vienna University of Technology（维也纳工业大学）
High-dimensional MCMC with a standard splitting scheme for the underdamped Langevin diffusion
研究了基于欠阻尼朗之万扩散的马尔可夫采样器对高维凸光滑势目标的采样效率。我们考虑一个经典的二阶积分器，每次迭代只需要一个梯度计算。相反，以前的作品类似的采样器，Wasserstein距离和收敛速度的总方差距离的无量纲收缩被证明为离散时间链本身。非渐近Wasserstein和全变差效率界和浓度不等式得到的Metropolis调整和未调整的链。\nv{In particular, for the unadjusted chain,}的尺寸$d$和所需的准确度$\varepsilon$，Wasserstein的效率界的顺序$\sqrt d / \varepsilon$在一般情况下，$\sqrt{d/\varepsilon}$，如果潜在的海森是Lipschitz，和$d^{1/4}/\sqrt\varepsilon$在一个可分离的目标的情况下，根据已知的结果为其他动力学朗之万或HMC计划。
Delocalization of bias in unadjusted Hamiltonian Monte Carlo and underdamped Langevin
Department of Mathematics, University of California, Los Angeles, CA 90095, USA（加州大学洛杉矶分校数学系）；Courant Institute, New York University, NY 10012, USA（纽约大学Courant研究所）
A uniform-in-time weakly convergent explicit numerical method for the underdamped Langevin equation with polynomial potentials
School of Mathematics and Statistics, Huazhong University of Science and Technology（华中科技大学数学与统计学院）；Hubei Key Laboratory of Engineering Modeling and Scientific Computing, Huazhong University of Science and Technology（华中科技大学工程建模与科学计算湖北省重点实验室）
Numerical integrators for confined Langevin dynamics
School of Mathematics and the Maxwell Institute for Mathematical Sciences, University of Edinburgh（爱丁堡大学数学学院与麦克斯韦数学科学研究所）；Department of Mathematical Sciences, Chalmers University of Technology and the University of Gothenburg（查尔姆斯理工大学数学系和哥德堡大学）；School of Mathematical Sciences, University of Nottingham（诺丁汉大学数学学院）
Variance Reduction for Stochastic Gradient Generalized Non-reversible Langevin Monte Carlo Algorithms
FinTech Thrust, Hong Kong University of Science and Technology (Guangzhou)（香港科技大学（广州）金融科技方向）；School of Mathematical Science, Fudan University（复旦大学数学学院）；Department of Mathematics, Florida State University（佛罗里达州立大学数学系）
Breaking Reversibility Accelerates Langevin Dynamics for Global Non-Convex Optimization
Department of Systems Engineering and Engineering Management, The Chinese University of Hong Kong, Shatin, N.T. Hong Kong（系统工程与工程管理系，香港中文大学（深圳））；Department of Management Science and Information Systems and the DIMACS Institute, Rutgers University, Piscataway, NJ-08854, United States of America（管理科学与信息系统系及DIMACS研究所，罗杰斯大学）；Department of Mathematics, Florida State University, 1017 Academic Way, Tallahassee, FL-32306, United States of America（数学系，佛罗里达州立大学）
