Information flow and optimal protocol for a Maxwell-demon single-electron pump.
We study the entropy and information flow in a Maxwell-demon device based on a single-electron transistor with controlled gate potentials. We construct the protocols for measuring the charge states and manipulating the gate voltages, which minimizes irreversibility for (i) constant input power from the environment or (ii) given energy gain. Charge measurement is modeled by a series of detector readouts for time-dependent gate potentials, and the amount of information obtained is determined. The protocols optimize irreversibility that arises due to (i) enlargement of the configuration space on opening the barriers, and (ii) finite rate of operation. These optimal protocols are general and apply to all systems in which barriers between different regions can be manipulated.
Department of Physics, University of Oslo, P.O. Box 1048 Blindern, N-0316 Oslo, Norway.
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Bergli
Department of Physics, University of Oslo, P.O. Box 1048 Blindern, N-0316 Oslo, Norway and A. F. Ioffe Physico-Technical Institute RAS, 194021 St. Petersburg, Russian Federation.
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Galperin
Low Temperature Laboratory, Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland and L.D. Landau Institute for Theoretical Physics, 117940 Moscow, Russia.
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Kopnin