Number of the records: 1
Diffusing up the Hill: Dynamics and Equipartition in Highly Unstable Systems
- 1.
SYSNO ASEP 0497952 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Diffusing up the Hill: Dynamics and Equipartition in Highly Unstable Systems Author(s) Šiler, Martin (UPT-D) RID, ORCID, SAI
Ornigotti, L. (CZ)
Brzobohatý, Oto (UPT-D) RID, ORCID, SAI
Jákl, Petr (UPT-D) RID, ORCID, SAI
Ryabov, A. (CZ)
Holubec, V. (CZ)
Zemánek, Pavel (UPT-D) RID, SAI, ORCID
Filip, R. (CZ)Number of authors 8 Article number 23601 Source Title Physical Review Letters. - : American Physical Society - ISSN 0031-9007
Roč. 121, č. 23 (2018)Number of pages 6 s. Publication form Print - P Language eng - English Country US - United States Keywords Brownian particle ; highly unstable systems Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects GB14-36681G GA ČR - Czech Science Foundation (CSF) LO1212 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) ED0017/01/01 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UPT-D - RVO:68081731 UT WOS 000451986100002 EID SCOPUS 85057741706 DOI 10.1103/PhysRevLett.121.230601 Annotation Stochastic motion of particles in a highly unstable potential generates a number of diverging trajectories leading to undefined statistical moments of the particle position. This makes experiments challenging and breaks down a standard statistical analysis of unstable mechanical processes and their applications. A newly proposed approach takes advantage of the local characteristics of the most probable particle motion instead of the divergent averages. We experimentally verify its theoretical predictions for a Brownian particle moving near an inflection in a highly unstable cubic optical potential. The most likely position of the particle atypically shifts against the force, despite the trajectories diverging in the opposite direction. The local uncertainty around the most likely position saturates even for strong diffusion and enables well-resolved position detection. Remarkably, the measured particle distribution quickly converges to a quasistationary one with the same atypical shift for different initial particle positions. The demonstrated experimental confirmation of the theoretical predictions approves the utility of local characteristics for highly unstable systems which can be exploited in thermodynamic processes to uncover energetics of unstable systems. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2019
Number of the records: 1