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Experiments on the Thermodynamics of Information Processing

2017-08-01 Science
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Release : 2017-08-01
Genre : Science
Kind : eBook
Book Rating : 944/5 ( reviews)

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Book Synopsis Experiments on the Thermodynamics of Information Processing by : Momčilo Gavrilov

Download or read book Experiments on the Thermodynamics of Information Processing written by Momčilo Gavrilov. This book was released on 2017-08-01. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reveals how the feedback trap technique, developed to trap small objects for biophysical measurement, could be adapted for the quantitative study of the thermodynamic properties of small systems. The experiments in this thesis are related to Maxwell’s demon, a hypothetical intelligent, “neat fingered” being that uses information to extract work from heat, apparently creating a perpetual-motion machine. The second law of thermodynamics should make that impossible, but how? That question has stymied physicists and provoked debate for a century and a half. The experiments in this thesis confirm a hypothesis proposed by Rolf Landauer over fifty years ago: that Maxwell’s demon would need to erase information, and that erasing information—resetting the measuring device to a standard starting state—requires dissipating as much energy as is gained. For his thesis work, the author used a “feedback trap” to study the motion of colloidal particles in “v irtual potentials” that may be manipulated arbitrarily. The feedback trap confines a freely diffusing particle in liquid by periodically measuring its position and applying an electric field to move it back to the origin.

Thermodynamics of Information Processing in Small Systems

2012-09-14 Science
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Release : 2012-09-14
Genre : Science
Kind : eBook
Book Rating : 683/5 ( reviews)

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Book Synopsis Thermodynamics of Information Processing in Small Systems by : Takahiro Sagawa

Download or read book Thermodynamics of Information Processing in Small Systems written by Takahiro Sagawa. This book was released on 2012-09-14. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a general theory of nonequilibrium thermodynamics for information processing. Ever since Maxwell's demon was proposed in the nineteenth century, the relationship between thermodynamics and information has attracted much attention because it concerns the foundation of the second law of thermodynamics. From the modern point of view, Maxwell's demon is formulated as an information processing device that performs measurement and feedback at the level of thermal fluctuations. By unifying information theory, measurement theory, and the recently developed theory of nonequilibrium statistical mechanics, the author has constructed a theory of "information thermodynamics," in which information contents and thermodynamic variables are treated on an equal footing. In particular, the maximum work that can be extracted by the demon and the minimum work that is needed for measurement and information erasure by the demon has been determined. Additionally, generalizations of nonequilibrium relations such as a Jarzynski equality for classical stochastic systems in the presence of feedback control have been derived. One of the generalized equalities has recently been verified experimentally by using sub-micron colloidal particles. The results obtained serve as fundamental principles for information processing in small thermodynamic systems, and are applicable to nanomachines and nanodevices.

The Energetics of Computing in Life and Machines

2018-09 Science
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Release : 2018-09
Genre : Science
Kind : eBook
Book Rating : 184/5 ( reviews)

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Book Synopsis The Energetics of Computing in Life and Machines by : Chris Kempes

Download or read book The Energetics of Computing in Life and Machines written by Chris Kempes. This book was released on 2018-09. Available in PDF, EPUB and Kindle. Book excerpt: Why do computers use so much energy? What are the fundamental physical laws governing the relationship between the precise computation run by a system, whether artificial or natural, and how much energy that computation requires? This volume integrates concepts from diverse fields, cultivating a modern, nonequilibrium thermodynamics of computation.

Thermodynamics of Information Processing in Small Systems

2012-09-13 Computers
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Release : 2012-09-13
Genre : Computers
Kind : eBook
Book Rating : 675/5 ( reviews)

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Book Synopsis Thermodynamics of Information Processing in Small Systems by : Takahiro Sagawa

Download or read book Thermodynamics of Information Processing in Small Systems written by Takahiro Sagawa. This book was released on 2012-09-13. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a general theory of nonequilibrium thermodynamics for information processing. Ever since Maxwell's demon was proposed in the nineteenth century, the relationship between thermodynamics and information has attracted much attention because it concerns the foundation of the second law of thermodynamics. From the modern point of view, Maxwell's demon is formulated as an information processing device that performs measurement and feedback at the level of thermal fluctuations. By unifying information theory, measurement theory, and the recently developed theory of nonequilibrium statistical mechanics, the author has constructed a theory of "information thermodynamics," in which information contents and thermodynamic variables are treated on an equal footing. In particular, the maximum work that can be extracted by the demon and the minimum work that is needed for measurement and information erasure by the demon has been determined. Additionally, generalizations of nonequilibrium relations such as a Jarzynski equality for classical stochastic systems in the presence of feedback control have been derived. One of the generalized equalities has recently been verified experimentally by using sub-micron colloidal particles. The results obtained serve as fundamental principles for information processing in small thermodynamic systems, and are applicable to nanomachines and nanodevices.

Statistical Thermodynamics of Nonequilibrium Processes

2012-12-06 Science
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Release : 2012-12-06
Genre : Science
Kind : eBook
Book Rating : 542/5 ( reviews)

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Book Synopsis Statistical Thermodynamics of Nonequilibrium Processes by : Joel Keizer

Download or read book Statistical Thermodynamics of Nonequilibrium Processes written by Joel Keizer. This book was released on 2012-12-06. Available in PDF, EPUB and Kindle. Book excerpt: The structure of the theory ofthermodynamics has changed enormously since its inception in the middle of the nineteenth century. Shortly after Thomson and Clausius enunciated their versions of the Second Law, Clausius, Maxwell, and Boltzmann began actively pursuing the molecular basis of thermo dynamics, work that culminated in the Boltzmann equation and the theory of transport processes in dilute gases. Much later, Onsager undertook the elucidation of the symmetry oftransport coefficients and, thereby, established himself as the father of the theory of nonequilibrium thermodynamics. Com bining the statistical ideas of Gibbs and Langevin with the phenomenological transport equations, Onsager and others went on to develop a consistent statistical theory of irreversible processes. The power of that theory is in its ability to relate measurable quantities, such as transport coefficients and thermodynamic derivatives, to the results of experimental measurements. As powerful as that theory is, it is linear and limited in validity to a neighborhood of equilibrium. In recent years it has been possible to extend the statistical theory of nonequilibrium processes to include nonlinear effects. The modern theory, as expounded in this book, is applicable to a wide variety of systems both close to and far from equilibrium. The theory is based on the notion of elementary molecular processes, which manifest themselves as random changes in the extensive variables characterizing a system. The theory has a hierarchical character and, thus, can be applied at various levels of molecular detail.

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