Overview
Prof. Stephen Teitsworth's research centers on theoretical and experimental studies of noise-driven processes in far-from-equilibrium systems. Recent activity has centered around the development and implementation of novel metrics such as stochastic area which allow one to quantify how far from equilibrium a system is. These concepts have been developed and applied to low dimensional systems such as mechanical mass-spring assemblies and coupled electronic circuits driven by out-of-equilibrium noise sources.
Two problems of current interest are: 1) the extension of the stochastic area and related concepts to high-dimensional spatially continuous systems such as elastic filaments (e.g., strings or rods) embedded in viscoelastic media and driven by active noise sources; 2) studies of first-passage processes associated with heating of trapped ions in Paul traps (in collaboration with the group of Prof. Noel at Duke).
Two problems of current interest are: 1) the extension of the stochastic area and related concepts to high-dimensional spatially continuous systems such as elastic filaments (e.g., strings or rods) embedded in viscoelastic media and driven by active noise sources; 2) studies of first-passage processes associated with heating of trapped ions in Paul traps (in collaboration with the group of Prof. Noel at Duke).
Current Appointments & Affiliations
Associate Professor of Physics
·
1995 - Present
Physics,
Trinity College of Arts & Sciences
Recent Publications
Irreversible dynamics of a continuum driven by active matter.
Journal Article Physical review. E · November 2024 We study the fluctuational behavior of overdamped elastic filaments (e.g., strings or rods) driven by active matter which induces irreversibility. The statistics of discrete normal modes are translated into the continuum of the position representation whic ... Full text CiteStochastic line integrals and stream functions as metrics of irreversibility and heat transfer.
Journal Article Physical review. E · August 2022 Stochastic line integrals are presented as a useful metric for quantitatively characterizing irreversibility and detailed balance violation in noise-driven dynamical systems. A particular realization is the stochastic area, recently studied in coupled elec ... Full text CiteScaling properties of noise-induced switching in a bistable tunnel diode circuit
Journal Article European Physical Journal B · April 1, 2019 Abstract: Noise-induced switching between coexisting metastable states occurs in a wide range of far-from-equilibrium systems including micro-mechanical oscillators, epidemiological and climate change models, and nonlinear electronic transport in tunneling ... Full text CiteRecent Grants
Switching Dynamics of Electric Field Domains in Semiconductor Superlattices
ResearchPrincipal Investigator · Awarded by National Science Foundation · 2008 - 2012DHB: Niches and Networks: Studying the Coevolution of Voluntary Groups and Social Networks
ResearchCo-Principal Investigator · Awarded by National Science Foundation · 2005 - 2007Development of Novel Photonic Nanostructures for Measurement in the Duke Femtosecond Terahertz Diagnostic Laboratory
ResearchPrincipal Investigator · Awarded by Lord Foundation of North Carolina · 2002 - 2005View All Grants
Education, Training & Certifications
Harvard University ·
1986
Ph.D.