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- Nikos Lazarides, G. P. Tsironis
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2005

For isotropic and homogeneous nonlinear left-handed materials, for which the effective medium approximation is valid, Maxwell's equations for electric and magnetic fields lead naturally, within the slowly varying envelope approximation, to a system of coupled nonlinear Schrodinger equations. This system is equivalent to the well-known Manakov model thatâ€¦ (More)

- Nikos Lazarides, Maria Eleftheriou, G. P. Tsironis
- Physical review letters
- 2006

Magnetic metamaterials composed of split-ring resonators or U-type elements may exhibit discreteness effects in THz and optical frequencies due to weak coupling. We consider a model one-dimensional metamaterial formed by a discrete array of nonlinear split-ring resonators where each ring interacts with its nearest neighbors. On-site nonlinearity and weakâ€¦ (More)

- Nikos Lazarides, G. P. Tsironis
- Physical review letters
- 2013

We introduce a one-dimensional parity-time- (PT-)symmetric nonlinear magnetic metamaterial consisting of split-ring dimers having both gain and loss. When nonlinearity is absent we find a transition between an exact to a broken PT phase; in the former, the system features a two band gapped spectrum with shape determined by the gain and loss coefficients asâ€¦ (More)

- Ioannis Kourakis, Nikos Lazarides, G. P. Tsironis
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2007

The self-modulation of waves propagating in nonlinear magnetic metamaterials is investigated. Considering the propagation of a modulated amplitude magnetic field in such a medium, we show that the self-modulation of the carrier wave leads to a spontaneous energy localization via the generation of localized envelope structures (envelope solitons), whose formâ€¦ (More)

A one dimensional, parity-time (PT )-symmetric magnetic metamaterial comprising split-ring resonators having both gain and loss is investigated. In the linear regime, the transition from the exact to the broken PT -phase is determined through the calculation of the eigenfrequency spectrum for two different configurations; the one with equidistantâ€¦ (More)

- J. Hizanidis, Nikos Lazarides, G. P. Tsironis
- Physical review. E
- 2016

We report on the emergence of robust multiclustered chimera states in a dissipative-driven system of symmetrically and locally coupled identical superconducting quantum interference device (SQUID) oscillators. The "snakelike" resonance curve of the single SQUID is the key to the formation of the chimera states and is responsible for the extremeâ€¦ (More)

- A. Maluckov, Lj HadÅ¾ievski, Nikos Lazarides, G. P. Tsironis
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2008

The left-handed properties of metamaterials with saturable nonlinearity are analyzed with respect to their electromagnetic response as a function of externally varying parameters. We demonstrate that the response of the medium is strongly affected by the saturation of the nonlinear effects. The last can be exploited to modulate the amplitude or tune theâ€¦ (More)

- Zeljko Ivic, Nikos Lazarides, G. P. Tsironis
- Scientific reports
- 2016

Quantum bits (qubits) are at the heart of quantum information processing schemes. Currently, solid-state qubits, and in particular the superconducting ones, seem to satisfy the requirements for being the building blocks of viable quantum computers, since they exhibit relatively long coherence times, extremely low dissipation, and scalability. Theâ€¦ (More)

- A. Maluckov, Lj HadÅ¾ievski, Nikos Lazarides, G. P. Tsironis
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2009

We perform statistical analysis on discrete nonlinear waves generated through modulational instability in the context of the Salerno model that interpolates between the integrable Ablowitz-Ladik (AL) equation and the nonintegrable discrete nonlinear SchrÃ¶dinger equation. We focus on extreme events in the form of discrete rogue or freak waves that may ariseâ€¦ (More)

- Nikos Lazarides, G. P. Tsironis, Yuri S Kivshar
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2008

We analyze the properties of discrete breathers excited near the edge of a one-dimensional metamaterial created by a truncated array of nonlinear split-ring resonators. We study a crossover between nonlinear surface states and discrete breathers by analyzing the modes centered at finite distances from the array edge and demonstrate the existence of a classâ€¦ (More)