Search results for maxwell demon

Quantum Physics Jul 10, 2017

Maxwell's demon extracts work from quantum measurement

(Phys.org)—Physicists have proposed a new type of Maxwell's demon—the hypothetical agent that extracts work from a system by decreasing the system's entropy—in which the demon can extract work just by making a measurement, ...

Quantum Physics Jul 5, 2017

Physicists read Maxwell's Demon's mind

Pioneering research offers a fascinating view into the inner workings of the mind of 'Maxwell's Demon', a famous thought experiment in physics.

Quantum Physics Oct 20, 2016

Researchers posit way to locally circumvent Second Law of Thermodynamics

For more than a century and a half of physics, the Second Law of Thermodynamics, which states that entropy always increases, has been as close to inviolable as any law we know. In this universe, chaos reigns supreme.

Quantum Physics Feb 12, 2016

Physicists create first photonic Maxwell's demon

(Phys.org)—Maxwell's demon, a hypothetical being that appears to violate the second law of thermodynamics, has been widely studied since it was first proposed in 1867 by James Clerk Maxwell. But most of these studies have ...

Quantum Physics Jan 12, 2016

Maxwell's demon as a self-contained, information-powered refrigerator

In 1867, Scottish physicist James Clerk Maxwell challenged the second law of thermodynamics according to which entropy in a closed system must always increase. In his thought experiment, Maxwell took a closed gas container, ...

Nanophysics Nov 7, 2014

How to make mobile batteries last longer by controlling energy flows at nano-level

Electronic devices waste a lot of energy by producing useless heat. This is one of the main reasons our mobiles use up battery power so quickly. Researchers at University of Luxembourg have made a leap forward in understanding ...

Quantum Physics Aug 4, 2014

Study explains how Maxwell's demon uses mutual information to extract work

(Phys.org) —Maxwell's demon, the hypothetical doorman that controls how particles travel between two chambers in an attempt to decrease entropy, is at its heart a feedback-controlled system. The demon makes measurements ...

Quantum Physics Jan 28, 2014

New theory suggests way to teleport energy long distances

(Phys.org) —A trio of researchers at Tohoku University in Japan, led by Masahiro Hotta, has proposed a new way to teleport energy that allows for doing so over long distances. In their paper published in Physical Review ...

Quantum Physics Dec 18, 2013

Maxwell's demon can use quantum information to generate work

(Phys.org) —In theory, Maxwell's demon can decrease the entropy of a system by opening and closing a door at appropriate times to separate hot and cold gas molecules. But as physicist Leó Szilárd pointed out in 1929, ...

Quantum Physics Feb 1, 2013

Scientists propose creating Maxwell's demon with two quantum dots

(Phys.org)—When you open your door on a cold winter day, the warm air from your home and the cold air from outside begin to mix and evolve toward thermal equilibrium, a state of complete entropy where the temperatures outside ...

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