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.
|Number of pages||9|
|Journal||Proceedings A: Mathematical, Physical and Engineering Sciences|
|Publication status||Published - 8 Jun 2011|
- information erasure
- canonical ensemble
- spin system