HighPrecision Test of Landauer's Principle in a Feedback Trap
Abstract
We confirm Landauer's 1961 hypothesis that reducing the number of possible macroscopic states in a system by a factor of 2 requires work of at least k T ln 2 . Our experiment uses a colloidal particle in a timedependent, virtual potential created by a feedback trap to implement Landauer's erasure operation. In a control experiment, similar manipulations that do not reduce the number of system states can be done reversibly. Erasing information thus requires work. In individual cycles, the work to erase can be below the Landauer limit, consistent with the Jarzynski equality.
 Publication:

Physical Review Letters
 Pub Date:
 November 2014
 DOI:
 10.1103/PhysRevLett.113.190601
 arXiv:
 arXiv:1408.5089
 Bibcode:
 2014PhRvL.113s0601J
 Keywords:

 05.70.Ln;
 03.67.a;
 05.20.y;
 05.90.+m;
 Nonequilibrium and irreversible thermodynamics;
 Quantum information;
 Classical statistical mechanics;
 Other topics in statistical physics thermodynamics and nonlinear dynamical systems;
 Condensed Matter  Statistical Mechanics;
 Quantum Physics
 EPrint:
 7 pages, 7 figures