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  • From: StatFizSzeminar <statfiz AT>
  • To: fizinfo AT
  • Subject: [Fizinfo] Stat Fiz Szeminarium
  • Date: Mon, 14 Jul 2014 13:07:26 +0200

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ELTE TTK Fizikai Intézet

2014. július 16.
szerda, 11 óra

Új helyszín:
É 4.52

György Korniss

Department of Physics, Applied Physics, and Astronomy
Rensselaer Polytechnic Institute

"The Impact of Time Delays on Network
Synchronization and Coordination in a Noisy Environment"

Coordinating, distributing, and balancing resources in networks
is a complex task and it is very sensitive to time delays. To
understand and manage the collective response in these coupled
interacting systems, one must understand the interplay of
stochastic effects, network connections, and time delays. In
synchronization and coordination problems in coupled interacting
systems individual units attempt to adjust their local state
variables (e.g., pace, orientation, load) in a decentralized
fashion. They interact or communicate only with their local
neighbors in the network, often with explicit or implicit
intention to improve global performance. Applications of the
corresponding models range from physics, biology, computer
science to control theory.

I will discuss the effects of nonzero time delays in stochastic
synchronization problems with linear couplings in an arbitrary
network. Further, by constructing the scaling theory of the
underlying fluctuations, we establish the absolute limit of
synchronization efficiency in a noisy environment with uniform
time delays, i.e., the minimum attainable value of the width of
the synchronization landscape [1,2]. These results have also
strong implications for optimization and trade-offs in network
synchronization with delays.

Supported in part by DTRA, NSF, ARL, and ONR.
[1] D. Hunt, G. Korniss, and B.K. Szymanski,
Phys. Rev. Lett. 105, 068701 (2010);
[2] D. Hunt, B.K. Szymanski, G. Korniss,
Phys. Rev. E 86, 056114 (2012);

1117, Budapest, Pázmány P. sétány 1/A, Északi tömb

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