{"title":"Response of electrohydrodynamic convection to external noise","authors":"Jong-Hoon Huh, Xiangwen Cui","doi":"10.1109/ICNF.2011.5994316","DOIUrl":null,"url":null,"abstract":"We report noise-induced threshold shifts in ac-driven electrohydrodynamic convection (EHC) in nematic liquid crystals. By changing the intensity V<inf>N</inf> and cutoff frequency ƒ<inf>c</inf> of noise, we investigate EHC-threshold shifts. There exists the characteristic cutoff frequency ƒ<inf>c</inf>* for the influence of noise on EHC. For cutoff frequencies ƒ<inf>c</inf> > ƒ<inf>c</inf>*, noise contributes to stabilizing the onset of EHC (i.e., it shifts the onset threshold upward), whereas for ƒ<inf>c</inf> < ƒ<inf>c</inf>*, noise contributes to destabilizing the onset of EHC (i.e., it shifts the onset threshold downward). For ƒ<inf>c</inf> = ƒ<inf>c</inf>*, noise makes no contribution to the threshold shift (i.e., it is neutral with respect to the onset of EHC). However, the pattern structure of EHC is changed by V<inf>N</inf>, independent of ƒ<inf>c</inf>.","PeriodicalId":137085,"journal":{"name":"2011 21st International Conference on Noise and Fluctuations","volume":"591 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2011-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2011 21st International Conference on Noise and Fluctuations","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICNF.2011.5994316","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We report noise-induced threshold shifts in ac-driven electrohydrodynamic convection (EHC) in nematic liquid crystals. By changing the intensity VN and cutoff frequency ƒc of noise, we investigate EHC-threshold shifts. There exists the characteristic cutoff frequency ƒc* for the influence of noise on EHC. For cutoff frequencies ƒc > ƒc*, noise contributes to stabilizing the onset of EHC (i.e., it shifts the onset threshold upward), whereas for ƒc < ƒc*, noise contributes to destabilizing the onset of EHC (i.e., it shifts the onset threshold downward). For ƒc = ƒc*, noise makes no contribution to the threshold shift (i.e., it is neutral with respect to the onset of EHC). However, the pattern structure of EHC is changed by VN, independent of ƒc.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
