Search Results for author: Nawaf Bou-Rabee

Found 8 papers, 2 papers with code

GIST: Gibbs self-tuning for locally adaptive Hamiltonian Monte Carlo

1 code implementation23 Apr 2024 Nawaf Bou-Rabee, Bob Carpenter, Milo Marsden

We present a novel and flexible framework for localized tuning of Hamiltonian Monte Carlo samplers by sampling the algorithm's tuning parameters conditionally based on the position and momentum at each step.

Position

Randomized Runge-Kutta-Nyström

no code implementations11 Oct 2023 Nawaf Bou-Rabee, Tore Selland Kleppe

We present 5/2- and 7/2-order $L^2$-accurate randomized Runge-Kutta-Nystr\"om methods to approximate the Hamiltonian flow underlying various non-reversible Markov chain Monte Carlo chains including unadjusted Hamiltonian Monte Carlo and unadjusted kinetic Langevin chains.

Unadjusted Hamiltonian MCMC with Stratified Monte Carlo Time Integration

no code implementations20 Nov 2022 Nawaf Bou-Rabee, Milo Marsden

A novel randomized time integrator is suggested for unadjusted Hamiltonian Monte Carlo (uHMC) in place of the usual Verlet integrator; namely, a stratified Monte Carlo (sMC) integrator which involves a minor modification to Verlet, and hence, is easy to implement.

Mixing Time Guarantees for Unadjusted Hamiltonian Monte Carlo

no code implementations3 May 2021 Nawaf Bou-Rabee, Andreas Eberle

We provide quantitative upper bounds on the total variation mixing time of the Markov chain corresponding to the unadjusted Hamiltonian Monte Carlo (uHMC) algorithm.

Couplings for Andersen Dynamics

no code implementations29 Sep 2020 Nawaf Bou-Rabee, Andreas Eberle

Andersen dynamics is a standard method for molecular simulations, and a precursor of the Hamiltonian Monte Carlo algorithm used in MCMC inference.

Coupling and Convergence for Hamiltonian Monte Carlo

no code implementations1 May 2018 Nawaf Bou-Rabee, Andreas Eberle, Raphael Zimmer

Based on a new coupling approach, we prove that the transition step of the Hamiltonian Monte Carlo algorithm is contractive w. r. t.

Geometric integrators and the Hamiltonian Monte Carlo method

1 code implementation14 Nov 2017 Nawaf Bou-Rabee, Jesús María Sanz-Serna

This paper surveys in detail the relations between numerical integration and the Hamiltonian (or hybrid) Monte Carlo method (HMC).

Probability Numerical Analysis Computation Methodology

Stochastic Variational Integrators

no code implementations16 Aug 2007 Nawaf Bou-Rabee, Houman Owhadi

This paper presents a continuous and discrete Lagrangian theory for stochastic Hamiltonian systems on manifolds.

Probability 65Cxx; 37Jxx

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