Spiral Wave Generation in a Vortex Electric Field

2011 ◽  
Vol 28 (10) ◽  
pp. 100505 ◽  
Author(s):  
Xiao-Ping Yuan ◽  
Jiang-Xing Chen ◽  
Ye-Hua Zhao ◽  
Qin Lou ◽  
Lu-Lu Wang ◽  
...  
Keyword(s):  
Electric Field ◽  
Spiral Wave ◽  
Wave Generation

scholarly journals Spiral wave unpinning facilitated by wave emitting sites in cardiac monolayers

2019 ◽  
Vol 475 (2230) ◽  
pp. 20190420
Author(s):  
Shreyas Punacha ◽  
Sebastian Berg ◽  
Anupama Sebastian ◽  
Valentin I. Krinski ◽  
Stefan Luther ◽  
...  
Keyword(s):  
Electric Field ◽  
Electrical Activity ◽  
Spiral Wave ◽  
Electrical Stimulus ◽  
Spiral Waves ◽  
Time Interval ◽  
Field Pulse ◽  
The Core ◽  
Rotating Wave ◽  
Multiple Obstacles

Rotating spiral waves of electrical activity in the heart can anchor to unexcitable tissue (an obstacle) and become stable pinned waves. A pinned rotating wave can be unpinned either by a local electrical stimulus applied close to the spiral core, or by an electric field pulse that excites the core of a pinned wave independently of its localization. The wave will be unpinned only when the pulse is delivered inside a narrow time interval called the unpinning window (UW) of the spiral. In experiments with cardiac monolayers, we found that other obstacles situated near the pinning centre of the spiral can facilitate unpinning. In numerical simulations, we found increasing or decreasing of the UW depending on the location, orientation and distance between the pinning centre and an obstacle. Our study indicates that multiple obstacles could contribute to unpinning in experiments with intact hearts.

Electric-field-induced spin wave generation using multiferroic magnetoelectric cells

2014 ◽  
Vol 104 (8) ◽  
pp. 082403 ◽  
Author(s):  
Sergiy Cherepov ◽  
Pedram Khalili Amiri ◽  
Juan G. Alzate ◽  
Kin Wong ◽  
Mark Lewis ◽  
...  
Keyword(s):  
Electric Field ◽  
Spin Wave ◽  
Wave Generation

Evolution of spiral wave and pattern formation in a vortical polarized electric field

2008 ◽  
Vol 17 (7) ◽  
pp. 2438-2445 ◽  
Author(s):  
Ma Jun ◽  
Yi Ming ◽  
Li Bing-Wei ◽  
Li Yan-Long
Keyword(s):  
Pattern Formation ◽  
Electric Field ◽  
Spiral Wave

Terahertz Wave Generation Device using Multi-Quantum Well with Transverse Electric Field

2005 ◽  
Vol 44 (9A) ◽  
pp. 6425-6428
Author(s):  
Isao Morohashi ◽  
Kazuhiro Komori ◽  
Noriaki Tsurumachi ◽  
Hisashi Shimura ◽  
Takehiko Hidaka ◽  
...  
Keyword(s):  
Electric Field ◽  
Quantum Well ◽  
Transverse Electric ◽  
Terahertz Wave ◽  
Wave Generation ◽  
Transverse Electric Field ◽  
Multi Quantum Well

scholarly journals Effects of randomization of characteristic times on spiral wave generation in a simple cellular automaton model of excitable media

AIP Advances ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 085116
Author(s):  
Vincent Vangelista ◽  
Karl Amjad-Ali ◽  
Minhyeok Kwon ◽  
Paulo H. Acioli
Keyword(s):  
Cellular Automaton ◽  
Spiral Wave ◽  
Wave Generation ◽  
Cellular Automaton Model ◽  
Excitable Media

Terahertz Wave Generation from Multi-Quantum Well with Transverse Electric Field

2003 ◽  
pp. 256-258
Author(s):  
Isao Morohashi ◽  
Kazuhiro Komori ◽  
Hisashi Shimura ◽  
Takehiko Hidaka ◽  
Hirokazu Ikeda ◽  
...  
Keyword(s):  
Electric Field ◽  
Quantum Well ◽  
Transverse Electric ◽  
Terahertz Wave ◽  
Wave Generation ◽  
Transverse Electric Field ◽  
Multi Quantum Well

POSSIBILITY OF RESONANCE RECORDING OF A CHARGE DENSITY GRATING IN AC ELECTRIC FIELD

1994 ◽  
Vol 03 (01) ◽  
pp. 19-24 ◽  
Author(s):  
A.V. DOOGHIN ◽  
B. YA. ZEL’DOVICH
Keyword(s):  
Electric Field ◽  
Charge Density ◽  
Interference Pattern ◽  
Large Amplitude ◽  
Wave Generation ◽  
Photorefractive Crystal ◽  
Wave Direction ◽  
Record Time ◽  
Ac Electric Field ◽  
A Charge

Application of large amplitude asymmetric AC electric field to a photorefractive crystal and illumination by a slowly running sinosoidal interference pattern may lead to resonant recording of a running grating. The resonance corresponds to the excitation of a variant of the traps recharge wave. We propose mechanism of wave generation and analyze wave direction, amplitude, frequency in the case when the period of field oscillations is much smaller than the grating record time.

EXCITABLE SPIRAL WAVES IN NEMATIC LIQUID CRYSTALS

1994 ◽  
Vol 04 (05) ◽  
pp. 1173-1182 ◽  
Author(s):  
P. COULLET ◽  
F. PLAZA
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Nematic Liquid Crystals ◽  
Spiral Wave ◽  
Spiral Waves ◽  
Excitable Medium ◽  
Ginzburg Landau ◽  
Landau Model ◽  
Excitable System ◽  
Mechanical Analog

A mechanical analog of the chemical and biological excitable medium is proposed. In nematic liquid crystals, the Freedericksz transition induced by a rotating tilted electric field provides a simple example of such a mechanical excitable system. We study this transition, derive a Ginzburg-Landau model for it, and show that the excitable spiral wave can be produced from a retractable finger-like soliton in this context.

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