Počet záznamů: 1  

Diffusing up the Hill: Dynamics and Equipartition in Highly Unstable Systems

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    SYSNO ASEP0497952
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevDiffusing up the Hill: Dynamics and Equipartition in Highly Unstable Systems
    Tvůrce(i) 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)
    Celkový počet autorů8
    Číslo článku23601
    Zdroj.dok.Physical Review Letters - ISSN 0031-9007
    Roč. 121, č. 23 (2018)
    Poč.str.6 s.
    Forma vydáníTištěná - P
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovaBrownian particle ; highly unstable systems
    Vědní obor RIVBH - Optika, masery a lasery
    Obor OECDOptics (including laser optics and quantum optics)
    CEPGB14-36681G GA ČR - Grantová agentura ČR
    LO1212 GA MŠk - Ministerstvo školství, mládeže a tělovýchovy
    ED0017/01/01 GA MŠk - Ministerstvo školství, mládeže a tělovýchovy
    Institucionální podporaUPT-D - RVO:68081731
    UT WOS000451986100002
    EID SCOPUS85057741706
    DOI10.1103/PhysRevLett.121.230601
    AnotaceStochastic 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.
    PracovištěÚstav přístrojové techniky
    KontaktMartina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178
    Rok sběru2019
Počet záznamů: 1