A J Sievers

A J Sievers

Cornell University

H-index: 58

North America-United States

About A J Sievers

A J Sievers, With an exceptional h-index of 58 and a recent h-index of 19 (since 2020), a distinguished researcher at Cornell University, specializes in the field of far infrared, nonlinear dynamics.

His recent articles reflect a diverse array of research interests and contributions to the field:

Propagating intrinsic localized mode in a cyclic, dissipative, self-dual one-dimensional nonlinear transmission line

Experimental study of intrinsic localized mode mobility in a cyclic, balanced, 1D nonlinear transmission line

Experimental investigation of supertransmission for an intrinsic localized mode in a cyclic nonlinear transmission line

Experimental observations of nonlinear vibration localization in a cyclic chain of weakly coupled nonlinear oscillators

Driven Intrinsic Localized Modes in Soft Nonlinear Microscopic and Macroscopic Lattices

A J Sievers Information

University

Cornell University

Position

Professor of Physics

Citations(all)

15150

Citations(since 2020)

1439

Cited By

15633

hIndex(all)

58

hIndex(since 2020)

19

i10Index(all)

228

i10Index(since 2020)

40

Email

University Profile Page

Cornell University

A J Sievers Skills & Research Interests

far infrared

nonlinear dynamics

Top articles of A J Sievers

Propagating intrinsic localized mode in a cyclic, dissipative, self-dual one-dimensional nonlinear transmission line

Authors

M Sato,H Furusawa,Y Soga,AJ Sievers

Journal

Physical Review E

Published Date

2023/3/7

A well-known feature of a propagating localized excitation in a discrete lattice is the generation of a backwave in the extended normal mode spectrum. To quantify the parameter-dependent amplitude of such a backwave, the properties of a running intrinsic localized mode (ILM) in electric, cyclic, dissipative, nonlinear 1D transmission lines, containing balanced nonlinear capacitive and inductive terms, are studied via simulations. Both balanced and unbalanced damping and driving conditions are treated. The introduction of a unit cell duplex driver, with a voltage source driving the nonlinear capacitor and a synchronized current source, the nonlinear inductor, provides an opportunity to design a cyclic, dissipative self-dual nonlinear transmission line. When the self-dual conditions are satisfied, the dynamical voltage and current equations of motion within a cell become the same, the strength of the fundamental …

Experimental study of intrinsic localized mode mobility in a cyclic, balanced, 1D nonlinear transmission line

Authors

M Sato,H Furusawa,M Sakai,Y Soga,AJ Sievers

Journal

Chaos: An Interdisciplinary Journal of Nonlinear Science

Published Date

2023/7/1

Mobile intrinsic localized modes (ILMs) in balanced nonlinear capacitive-inductive cyclic transmission lines are studied by experiment, using a spatiotemporal driver under damped steady-state conditions. Without nonlinear balance, the experimentally observed resonance between the traveling ILM and normal modes of the nonlinear transmission line generates lattice drag via the production of a lattice backwave. In our experimental study of a balanced running ILM in a steady state, it is observed that the fundamental resonance can be removed over extended, well-defined driving frequency intervals and strongly suppressed over the complete ILM driving frequency range. Because both of these nonlinear capacitive and inductive elements display hysteresis our observation demonstrates that the experimental system, which is only partially self-dual, is surprisingly tolerant, regarding the precision necessary to …

Experimental investigation of supertransmission for an intrinsic localized mode in a cyclic nonlinear transmission line

Authors

M Sato,H Furusawa,M Sakai,Y Soga,AJ Sievers

Journal

Chaos: An Interdisciplinary Journal of Nonlinear Science

Published Date

2022/3/1

In this experimental study of the nonlinear loss mechanism between traveling localized excitation and the underlying extended normal mode spectrum for a 1D lattice, three types of cyclic, electric, nonlinear transmission lines (NLTLs) are used. They are nonlinear capacitive, inductive, and capacitive+ inductive NLTLs. To maintain a robust, steady-state traveling intrinsic localized mode (ILM), a traveling wave driver is used. The ILM loses energy because of a resonance between it and the extended NLTL modes. A wake field excitation is detected directly from ILM velocity experiments by the decrease in ILM speed and by the observation of the wake. Its properties are quantified via a two-dimensional Fourier map in the frequency-wavenumber domain, determined from the measured spatial-time voltage pattern. Simulations support and extend these experimental findings. We find for the capacitive+ inductive NLTL …

Experimental observations of nonlinear vibration localization in a cyclic chain of weakly coupled nonlinear oscillators

Authors

Björn Niedergesäß,Antonio Papangelo,Aurélien Grolet,Alessandra Vizzaccaro,Filipe Fontanela,Loic Salles,AJ Sievers,Norbert Hoffmann

Journal

Journal of sound and vibration

Published Date

2021/4/14

Experimental results on nonlinear vibration localization in a cyclic chain of weakly coupled oscillators with clearance nonlinearity are reported. Numerical modelling and analysis complements the experimental study. A reduced order model is derived and numerical analysis based on the harmonic balance method demonstrates the existence of multiple classes of stable spatially localized nonlinear vibration states. The experiments agree very well with the numerical results. The findings suggest that vibration localization due to fundamentally nonlinear effects may also arise in mechanical structures with relevance in engineering.

Driven Intrinsic Localized Modes in Soft Nonlinear Microscopic and Macroscopic Lattices

Authors

Masayuki Sato,Masato Sakai,AJ Sievers

Published Date

2021

The possibility that large amplitude, localized vibrational excitations can exist in periodic physical lattices with nonlinear intersite forces was discovered over thirty years ago. The energy profiles of these intrinsic localized modes (ILMs) resemble those of localized vibrational modes at defects in a harmonic lattice. Described here are a variety of experiments on driver locked ILMs for two soft nonlinear lattices: an atomic spin array and an electrical nonlinear transmission line. CW locked ILMs in the quasi-1D antiferromagnet (C2H5NH3)2CuCl4 have been found at frequencies below the antiferromagnetic resonance by employing four-wave mixing emission. A discrete step structure is observed in the emission signal as well as repeatable nonlinear ILM switching and hysteresis. These findings are compared with locked ILMs and large amplitude lattice spatial modes (LSMs) that have been measured for a driven …

See List of Professors in A J Sievers University(Cornell University)

A J Sievers FAQs

What is A J Sievers's h-index at Cornell University?

The h-index of A J Sievers has been 19 since 2020 and 58 in total.

What are A J Sievers's top articles?

The articles with the titles of

Propagating intrinsic localized mode in a cyclic, dissipative, self-dual one-dimensional nonlinear transmission line

Experimental study of intrinsic localized mode mobility in a cyclic, balanced, 1D nonlinear transmission line

Experimental investigation of supertransmission for an intrinsic localized mode in a cyclic nonlinear transmission line

Experimental observations of nonlinear vibration localization in a cyclic chain of weakly coupled nonlinear oscillators

Driven Intrinsic Localized Modes in Soft Nonlinear Microscopic and Macroscopic Lattices

are the top articles of A J Sievers at Cornell University.

What are A J Sievers's research interests?

The research interests of A J Sievers are: far infrared, nonlinear dynamics

What is A J Sievers's total number of citations?

A J Sievers has 15,150 citations in total.

    academic-engine

    Useful Links