Взаимная синхронизация наногенераторов, связанных с помощью спиновых волн

AbstractThe dynamic behavior of a system of two spin-wave-coupled nanooscillators with various values of coupling strength and frequency mismatch has been analyzed. The parameter space of the system has been divided into the regions of existence of synchronous and quasi-synchronous regimes, beats, and the regime of oscillation suppression. The regions of multistable behavior have been identified. The behavior at the boundaries of capture and retention regions has been studied. Dependences of the width of capture and retention bands on the strength of nanooscillator coupling have been obtained.

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Review of accelerator-based searches for Neutral Long-Lived Particles

Revista de la Academia Colombiana de Ciencias Exactas Físicas y Naturales ◽

10.18257/raccefyn.915 ◽

2019 ◽

Vol 43 (169) ◽

pp. 638-645

Author(s):

Marta Losada

Keyword(s):

Parameter Space ◽

Coupling Strength ◽

Current Status ◽

Next Generation ◽

Fixed Target ◽

Beam Dump ◽

Basic Formalism ◽

Neutral Lepton

In this paper we present the current status of searches for neutral long-lived particles. The basic formalism that allows the determination of the number of expected long-lived particles is presented. Heavy neutral leptons can be a type of long-lived particles. The main observational motivations for the existence of heavy neutral lepton is covered as well. A summary of the main results from both collider searches and fixed target/beam dump experiments is presented. The outlook for next generation experiments and their impact on the parameter space of coupling strength and mass of heavy neutral leptons is also discussed.

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Analysis of a Class of Low-Dimensional Models of Mutation and Predation

International Journal of Bifurcation and Chaos ◽

10.1142/s0218127416300299 ◽

2016 ◽

Vol 26 (11) ◽

pp. 1630029 ◽

Cited By ~ 3

Author(s):

Gavin M. Abernethy ◽

Mark McCartney

Keyword(s):

Dynamic Behavior ◽

Lyapunov Exponents ◽

Parameter Space ◽

Numerical Results ◽

Discrete Models ◽

Two Dimensional ◽

Dimensional Models ◽

Low Dimensional ◽

Selection Of

We consider a class of simple two-dimensional discrete models representative of a system incorporating both mutation and predation. A selection of analytic and numerical results are presented, classifying the dynamic behavior of the system by means of Lyapunov exponents over a biologically-reasonable region of parameter space, and illustrating the occurrence of hyperchaos and a Neimark–Sacker bifurcation producing regions of quasiperiodicity.

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Influence of Rashba spin-orbit and Rabi couplings on the spin-mixing and ground state phases of binary Bose-Einstein condensates

Journal of Physics B Atomic Molecular and Optical Physics ◽

10.1088/1361-6455/ac41b2 ◽

2021 ◽

Author(s):

Ravisankar Rajamanickam ◽

Sriraman Thangarasu ◽

Ramavarmaraja Kishor Kumar ◽

Muruganandam Paulsamy ◽

Pankaj Kumar Mishra

Keyword(s):

Phase Transition ◽

Plane Wave ◽

Parameter Space ◽

Ground State ◽

Coupling Strength ◽

Coupling Parameter ◽

Spin Orbit ◽

Interspecies Interactions ◽

Bose Einstein ◽

Ground State Phases

Abstract We study the miscibility properties and ground state phases of two-component spin-orbit (SO) coupled Bose-Einstein condensates (BECs) in a harmonic trap with strong axial confinement. By numerically solving the coupled Gross-Pitaevskii equations in the two-dimensional setting, we analyze the SO-coupled BECs for two possible permutations of the intra- and interspecies interactions, namely (i) weak intra- and weak interspecies interactions (W-W) and (ii) weak intra- and strong interspecies interactions (W-S). Considering the density overlap integral as a miscibility order parameter, we investigate the miscible-immiscible transition by varying the coupling parameters. We obtain various ground state phases, including plane wave, half quantum vortex, elongated plane wave, and different stripe wave patterns for W-W interactions. For finite Rabi coupling, an increase in SO coupling strength leads to the transition from the fully miscible to the partially miscible state. We also characterize different ground states in the coupling parameter space using the root mean square sizes of the condensate. The spin density vector for the ground state phases exhibits density, quadrupole and dipole like spin polarizations. For the W-S interaction, in addition to that observed in the W-W case, we witness semi vortex, mixed mode, and shell-like immiscible phases. We notice a wide variety of spin polarizations, such as density, dipole, quadrupole, symbiotic, necklace, and stripe-like patterns for the W-S case. A detailed investigation in the coupling parameter space indicates immiscible to miscible state phase transition upon varying the Rabi coupling for a fixed Rashba SO coupling. The critical Rabi coupling for the immiscible-miscible phase transition decreases upon increasing the SO coupling strength.

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Li–Yorke Chaos in Globally Coupled Map Lattice with Delays

International Journal of Bifurcation and Chaos ◽

10.1142/s0218127419501839 ◽

2019 ◽

Vol 29 (13) ◽

pp. 1950183

Author(s):

Mayurakshi Nag ◽

Swarup Poria

Keyword(s):

Parameter Space ◽

Coupling Strength ◽

Coupled Map Lattice ◽

Matrix Norm ◽

Ring Network ◽

Smooth Maps ◽

Lattice Size ◽

Global Coupling ◽

Homogeneous Unit

Delay coupled smooth maps over a ring network with global coupling have been considered. Proof of the existence of chaos in the sense of Li–Yorke in the globally coupled smooth maps with homogeneous unit delay has been given by defining a suitable matrix norm. Conditions for the existence of Li–Yorke chaos depending on the coupling strength, map parameter and lattice size have been derived analytically. Chaotic regions in the parameter space are plotted numerically for delay coupled logistic maps.

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ON THE PARAMETER-SPACE CLASSIFICATION OF THE DYNAMIC BEHAVIOR OF A CONTINUOUS MICROBIAL FLOW REACTOR

Chemical Engineering Communications ◽

10.1080/00986448508911178 ◽

1985 ◽

Vol 33 (5-6) ◽

pp. 325-335 ◽

Cited By ~ 3

Author(s):

SHIGEHARU SUZUKI ◽

KAZUYUKI SHIMIZU ◽

MASAKAZU MATSUBARA

Keyword(s):

Dynamic Behavior ◽

Parameter Space ◽

Flow Reactor

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Heteroclinic Cycles in a Competitive Network

International Journal of Bifurcation and Chaos ◽

10.1142/s0218127417300440 ◽

2017 ◽

Vol 27 (12) ◽

pp. 1730044 ◽

Cited By ~ 1

Author(s):

Ulises Chialva ◽

Walter Reartes

Keyword(s):

Dynamic Behavior ◽

Parameter Space ◽

Global Bifurcation ◽

Simple Modification ◽

Heteroclinic Cycles ◽

Linear Networks ◽

Global Dynamic ◽

Competitive Network ◽

Nonsmooth Systems

The competitive threshold linear networks have been recently developed and are typical examples of nonsmooth systems that can be easily constructed. Due to their flexibility for manipulation, they are used in several applications, but their dynamics (both local and global) are not completely understood. In this work, we take some recently developed threshold systems and by a simple modification in the parameter space, we obtain new global dynamic behavior. Heteroclinic cycles and other remarkable scenarios of global bifurcation are reported.

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