Colloquium
Department of Physics, NCU
Information and Thermodynamics:Experimental verification of Landauer’s principle
Speaker
Prof. Yonggun Jun (田溶根)
Department of Physics, NCU
Date 2016.09.20(Tue)
Time 14:00
Place S4-625
Abstract:
Landauer’s principle states that an irreversible logical operation must dissipate energy into heat, no matter how slowly it is performed. For example, to ”reset to 1″ of a memory bit that can be in state 0 or 1 requires at least kTln2 of work, which is called Landauer’s bound. In this talk, I will present experimental verification of this theory using an electrophoretic feedback trap that is able to create the time-dependent double-well potential in space. A colloidal particle starts from left (0) or right (1) well and ends up the right well. In this process, we found that the work required to reduce the number of possible system states by a factor of two gradually approaches to kTln2 as the processing time increases. By contrast, I have also shown that similar manipulations that do not reduce the number of system states require no work when done infinitely slowly.