We study the thermodynamics of a Brownian particle under the influence of a time-multiplexed harmonic potential of finite width. The memory storage mechanism and the erasure protocol based on time-multiplexed potentials are utilized to experimentally realize erasure with work performed close to Landauer's bound. We quantify the work performed on the system with respect to the duty ratio of time multiplexing, which also provides a handle for approaching reversible erasures. A Langevin dynamics based simulation model is developed for the proposed memory bit and the erasure protocol, which guides the experimental realization. The study also provides insight into transport on the microscale.
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We would like to thank Prof. A. Majumdar, Stanford University for initial discussion about the problem, Prof. S. Salapaka, University of Illinois, Urbana Champaign for his comments, T. Aggarwal, Cymer LLC, S. Roychowdhury, GE Research for their contributions towards building the optical tweezer setup. The research reported was supported by the National Science Foundation under Grant No. CMMI- 1462862.
© 2017 American Physical Society.