Journal ArticleDOI
Feedback for physicists: A tutorial essay on control
TLDR
In this paper, a tutorial essay aims to give enough of the formal elements of control theory to satisfy the experimentalist designing or running a typical physics experiment and enough to satisfy a theorist wishing to understand its broader intellectual context.Abstract:
Feedback and control theory are important ideas that should form part of the education of a physicist but rarely do. This tutorial essay aims to give enough of the formal elements of control theory to satisfy the experimentalist designing or running a typical physics experiment and enough to satisfy the theorist wishing to understand its broader intellectual context. The level is generally simple, although more advanced methods are also introduced. Several types of applications are discussed, as the practical uses of feedback extend far beyond the simple regulation problems where it is most often employed. Sketches are then provided of some of the broader implications and applications of control theory, especially in biology, which are topics of active research.read more
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Journal ArticleDOI
Progress in single-molecule tracking spectroscopy
Hu Cang,C. Shan Xu,Haw Yang +2 more
TL;DR: In this article, the authors provide an overview of the recent advances toward this goal and describes future developments and potential applications, as well as future applications and applications of the proposed approach.
Journal ArticleDOI
Stochastic thermodynamics of Langevin systems under time-delayed feedback control: Second-law-like inequalities.
TL;DR: This paper performs a comprehensive study of small stochastic systems governed by an underdamped Langevin equation and driven out of equilibrium by a time-delayed continuous feedback control and derives a set of second-law-like inequalities that provide bounds to the rate of extracted work.
Journal ArticleDOI
Constructive Proof of Global Lyapunov Function as Potential Function
TL;DR: In this paper, the equivalence of the global Lyapunov function in engineering and the potential function in physics was established, which suggests new approaches on the significant unsolved problem namely to construct LyAPunov functions for general nonlinear systems through the analogy with existing methods on potential functions.
Journal ArticleDOI
Three-dimensional tracking of a single fluorescent nanoparticle using four-focus excitation in a confocal microscope.
James A. Germann,Lloyd M. Davis +1 more
TL;DR: Fluorescence correlation spectroscopy and calibration measurements indicate a net fluorescence photon detection efficiency of ~6-9%, comparable to that of an optimized single-molecule microscope.
Journal ArticleDOI
Self-consistent calculation of spin transport and magnetization dynamics
TL;DR: In this paper, the authors focus on the feedback mechanism of the spin-polarized current to the magnetization dynamics, and present recent progress in self-consistent calculations of the coupled dynamics.
References
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TL;DR: The author examines the role of entropy, inequality, and randomness in the design of codes and the construction of codes in the rapidly changing environment.
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System Identification: Theory for the User
TL;DR: Das Buch behandelt die Systemidentifizierung in dem theoretischen Bereich, der direkte Auswirkungen auf Verstaendnis and praktische Anwendung der verschiedenen Verfahren zur IdentifIZierung hat.
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Statistical mechanics of complex networks
TL;DR: In this paper, a simple model based on the power-law degree distribution of real networks was proposed, which was able to reproduce the power law degree distribution in real networks and to capture the evolution of networks, not just their static topology.
Journal ArticleDOI
The Structure and Function of Complex Networks
TL;DR: Developments in this field are reviewed, including such concepts as the small-world effect, degree distributions, clustering, network correlations, random graph models, models of network growth and preferential attachment, and dynamical processes taking place on networks.