Experimental test of the differential fluctuation theorem and realization of the Feynman’s ratchet with an optically trapped nanosphere (Conference Presentation)

Tongcang Li

doi:10.1117/12.2325059

17 September 2018 Experimental test of the differential fluctuation theorem and realization of the Feynman’s ratchet with an optically trapped nanosphere (Conference Presentation)

Tongcang Li

Author Affiliations +

Proceedings Volume 10723, Optical Trapping and Optical Micromanipulation XV; 107230B (2018) https://doi.org/10.1117/12.2325059
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States

Abstract

Nonequilibrium processes of small systems are ubiquitous in physics, biology, and chemistry. Optical tweezers provide an ideal tool for controlling small systems to investigate nonequilibrium thermodynamics. Recently, we performed the first experimental test of the differential fluctuation theorem, using an optically levitated nanosphere in air in both underdamped and overdamped regimes, and in both spatial and velocity spaces [Phys. Rev. Lett., 120, 080602 (2018)]. We also experimentally realized the Feynman’s ratchet, using a colloidal particle in water confined in an optical tweezer array under feedback control. Feynman's ratchet is a microscopic machine in contact with two heat reservoirs that was proposed by Richard Feynman in 1960’s to illustrate the second law of thermodynamics. Despite broad interests, an experimental realization of Feynman's ratchet has not been reported before our work.

Conference Presentation

Citation Download Citation

Tongcang Li "Experimental test of the differential fluctuation theorem and realization of the Feynman’s ratchet with an optically trapped nanosphere (Conference Presentation)", Proc. SPIE 10723, Optical Trapping and Optical Micromanipulation XV, 107230B (17 September 2018); https://doi.org/10.1117/12.2325059

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available