Papers › Information engine in a nonequilibrium bath
Information engine in a nonequilibrium bath
Tushar K. Saha, Jannik Ehrich, Momčilo Gavrilov, Susanne Still, David A. Sivak, John Bechhoefer
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Information engines can convert thermal fluctuations of a bath at temperature T into work at rates of order k_BT per relaxation time of the system. We show experimentally that such engines, when in contact with a bath that is out of equilibrium, can extract much more work. We place a heavy, micron-scale bead in a harmonic potential that ratchets up to capture favorable fluctuations. Adding a fluctuating electric field increases work extraction up to ten times, limited only by the strength of applied field. Our results connect Maxwell's demon with energy harvesting and an estimate of efficiency shows that information engines in nonequilibrium baths can greatly outperform conventional engines.
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