Information erasure without an energy cost

Details Information erasure without an energy cost Information erasure without an energy cost

2010-04-29

arxiv.org/abs/1004.5330v2

Proc. R. Soc. A 467, 1770-1778 (2011)

Physics

Quantum Physics

8 pages with 1 figure. Final published version

Scientific paper

10.1098/rspa.2010.0577

Landauer argued that the process of erasing the information stored in a memory device incurs an energy cost in the form of a minimum amount of mechanical work. We find, however, that this energy cost can be reduced to zero by paying a cost in angular momentum or any other conserved quantity. Erasing the memory of Maxwell's demon in this way implies that work can be extracted from a single thermal reservoir at a cost of angular momentum and an increase in total entropy. The implications of this for the second law of thermodynamics are assessed.

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