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Broken symmetries and directed collective energy transport in spatially extended systems

MPG-Autoren
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Flach,  Sergej
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Miroshnichenko,  Andrey E.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Fistul,  Mikhail V.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Zitation

Flach, S., Zolotaryuk, Y., Miroshnichenko, A. E., & Fistul, M. V. (2002). Broken symmetries and directed collective energy transport in spatially extended systems. Physical Review Letters, 88(18): 184101. doi:10.1103/PhysRevLett.88.184101.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-002C-5B42-8
Zusammenfassung
We study the appearance of directed energy current in homogeneous spatially extended systems coupled to a heat bath in the presence of an external ac field E(t) . The systems are described by nonlinear field equations. By making use of a symmetry analysis, we predict the right choice of E(t) and obtain directed energy transport for systems with a nonzero topological charge Q . We demonstrate that the symmetry properties of motion of topological solitons (kinks and antikinks) are equivalent to the ones for the energy current. Numerical simulations confirm the predictions of the symmetry analysis and, moreover, show that the directed energy current drastically increases as the dissipation parameter alpha reduces.