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
Citations
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Journal ArticleDOI
Implementation of the direct locking method for long-term carrier-envelope-phase stabilization of a grating-based kHz femtosecond laser
TL;DR: In this article, the carrier-envelope phase (CEP) of amplified femtosecond laser pulses from a grating-based chirped-pulse amplification femtocond laser was stabilized by the direct locking method.
Journal ArticleDOI
Reduction of oscillator dynamics on complex networks to dynamics on complete graphs through virtual frequencies.
Jian Gao,Konstantinos Efstathiou +1 more
TL;DR: The virtual frequency distribution encodes both the natural frequency distribution (dynamics) and the degree distribution (topology) and gives direct explanations to a variety of phenomena that have been observed in complex networks, such as explosive synchronization and vanishing synchronization onset.
Proceedings ArticleDOI
Cooling a macroscopic mechanical oscillator close to its quantum ground state
R. Metzdorff,Leonhard Neuhaus,Salim Zerkani,Sheon Chua,Thibaut Jacqmin,Samuel Deléglise,Tristan Briant,Pierre-François Cohadon,Antoine Heidmann +8 more
TL;DR: In this article, the authors showed that the typical mass of the mechanical degree of freedom in these two research fields differs by twelve orders of magnitude, despite sharing the same fundamental optomechanical coupling mechanism.
Journal ArticleDOI
Feedback traps for virtual potentials
Momčilo Gavrilov,John Bechhoefer +1 more
TL;DR: It is argued that, when you want to know the average heat transferred to a bath in a long protocol, you should measure the average work and then infer the heat using the first law of thermodynamics.
Journal ArticleDOI
Modeling the role of covalent enzyme modification in Escherichia coli nitrogen metabolism
Philip B Kidd,Ned S. Wingreen +1 more
TL;DR: It is argued that the lag inherent in the covalent modification of GS slows the response to an ammonium shock and thereby allows GS to transiently detoxify the cell, while maintaining homeostasis over longer times.
References
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Book
Elements of information theory
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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
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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.