Skip navigation

상단메뉴

글로벌메뉴

좌측메뉴

물리학부

검색

논문

Seminar
NUMBER  
AUTHOR Park, Hyunggyu,Lee, Jae Sung,Lee, Jae Sung,Park, Hyunggyu
TITLE Effects of the non-Markovianity and non-Gaussianity of active environmental noises on engine performance
ARCHIVE  
FILE  
JOURNAL PHYSICAL REVIEW E, 2022
ABSTRACT An active environment is a reservoir containing active materials, such as bacteria and Janus particles. Given the self-propelled motion of these materials, powered by chemical energy, an active environment has unique, nonequilibrium environmental noise. Recently, studies on engines that harvest energy from active environments have attracted a great deal of attention because the theoretical and experimental findings indicate that these engines outperform conventional ones. Studies have explored the features of active environments essential for outperformance, such as the non-Gaussian or non-Markovian nature of the active noise. We systematically study the effects of the non-Gaussianity and non-Markovianity of active noise on engine performance. We show that non-Gaussianity is irrelevant to the performance of an engine driven by any linear force (including a harmonic trap) regardless of time dependency, whereas non-Markovianity is relevant. However, for a system driven by a general nonlinear force, both non-Gaussianity and non-Markovianity enhance engine performance. Also, the memory effect of an active reservoir should be considered when fabricating a cyclic engine.
  • before page
  • list
  • next page

fiel&date

~