Chimera states and synchronization in magnetically driven SQUID metamaterials
arXiv:1601.04843 · doi:10.1140/epjst/e2016-02668-9
Abstract
Superconducting QUantum Interference Device (SQUID) metamaterials are superconducting artificial media whose function relies both on their geometry and the extraordinary properties of superconductivity and the Josephson effect. Recent experiments on one- and two-dimensional radio-frequency (rf) SQUID metamaterials have revealed their wide-band tuneability, significantly reduced losses, dynamic multistability, and tunable broadband transparency. The simplest version of an rf SQUID involves a superconducting ring interrupted by a Josephson junction; this device is a highly nonlinear resonator with a strong response to applied magnetic fields. SQUID metamaterials exhibit peculiar magnetic properties such as negative diamagnetic permeability, predicted both for the quantum and the classical regime. The applied alternating fields induce (super)currents in the SQUID rings, which are therefore coupled through dipole-dipole magnetic forces. This interaction is weak due to its magnetic nature. However, it couples the SQUIDs non-locally since it falls-off as the inverse cube of their center-to-center distance.
arXiv admin note: text overlap with arXiv:1408.6072
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- Multi-branched resonances, chaos through quasiperiodicity, and asymmetric states in a superconducting dimer
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- Tuning of Strong Nonlinearity in rf SQUID Meta-Atoms
- Using Phase Dynamics to Study Partial Synchrony: Three Examples
- Effects of Strong Capacitive Coupling Between Meta-Atoms in rf SQUID Metamaterials