學術演講‎ > ‎

<專題討論>2017/5/11(四)14:30綜合大樓2樓48218教室演講「Virtual potential in the feedback trap and Landauer's principle」( 田溶根 副教授 / 中央大學物理系)

張貼者:2017年5月4日 下午10:53Dabby Lu   [ 已更新 2017年5月4日 下午10:55 ]

In this talk, I will introduce the feedback trap using the electrophoretic force, called Anti-Brownian ELectrophoretic (ABEL) trap. This is a tool for trapping and manipulating a less-than-micron-sized charged object. The trap first acquires the position of a molecule, calculates the corresponding force of the desired potential, and applies the feedback voltage to bring the molecule to the destination, and finally, can generate the arbitrary VIRTUAL potential whose dynamics is very close to the real potential.

As an application of the virtual potential in the feedback trap, I will also present the experimental study on the fundamental connections between information and thermodynamics, especially, the Landauer's principle. It states that an irreversible logical operation must dissipate energy into heat, no matter how slowly it is performed. For example, RESET of one-bit memory requires at least kTln2 of work, which is called Landauer's erasure principle. We manipulated a colloidal particle starting from the left or right well and ending up the right well, indicating the reduction of two possible states to one. In this process, we found that the work required gradually approaches to kTln2 as the processing cycle time increases.

Ċ
Dabby Lu,
2017年5月4日 下午10:53
Comments