Cooperative surmounting of bottlenecks
Cooperative surmounting of bottlenecks
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合作突破瓶颈
DOI:
10.1016/j.physrep.2015.05.003
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
P. Hänggi
中科院分区:
文献类型:
--
作者:
D. Hennig;C. Mulhern;L. Schimansky-Geier;G.P. Tsironis;P. Hänggi
The physics of activated escape of objects out of a metastable state plays a key role in diverse scientific areas involving chemical kinetics, diffusion and dislocation motion in solids, nucleation, electrical transport, motion of flux lines superconductors, charge density waves, and transport processes of macromolecules and astrophysics, to name but a few. The underlying activated processes present the multidimensional extension of the Kramers problem of a single Brownian particle. In comparison to the latter case, however, the dynamics ensuing from the interactions of many coupled units can lead to intriguing novel phenomena that are not present when only a single degree of freedom is involved. In this review we report on a variety of such phenomena that are exhibited by systems consisting of chains of interacting units in the presence of potential barriers.In the first part we consider recent developments in the case of a deterministic dynamics driving cooperative escape processes of coupled nonlinear units out of metastable states. The ability of chains of coupled units to undergo spontaneous conformational transitions can lead to a self-organised escape. The mechanism at work is that the energies of the units become re-arranged, while keeping the total energy conserved, in forming localised energy modes that in turn trigger the cooperative escape. We present scenarios of significantly enhanced noise-free escape rates if compared to the noise-assisted case.The second part of the review deals with the collective directed transport of systems of interacting particles overcoming energetic barriers in periodic potential landscapes. Escape processes in both time-homogeneous and time-dependent driven systems are considered for the emergence of directed motion. It is shown that ballistic channels immersed in the associated mixed high-dimensional phase space are at the source for the directed long-range transport. Open problems and future directions are discussed in order to invigorate readers to engage in their own research.
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DOI:
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发表时间:
2004
期刊:
影响因子:
--
作者:
P. Kraikivski;R. Lipowsky;J. Kierfeld
通讯作者:
J. Kierfeld
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
S. Denisov;S. Flach;P. Hänggi
通讯作者:
P. Hänggi
DOI:
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发表时间:
2007
期刊:
影响因子:
--
作者:
D. Hennig;L. Schimansky;P. Hänggi
通讯作者:
P. Hänggi
DOI:
--
发表时间:
2010
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
D. Hennig;A. Burbanks;C. Mulhern;A. Osbaldestin
通讯作者:
A. Osbaldestin
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
D. Hennig
通讯作者:
D. Hennig