1/f noise for intermittent quantum dots exhibits non-stationarity and critical exponents
The power spectrum of quantum dot (QD) fluorescence exhibits $1/{{f}^{\beta }}$ noise, related to the intermittency of these nanosystems. As in other systems exhibiting $1/f$ noise, this power spectrum is not integrable at low frequencies, which appears to imply infinite total power. We report measu...
| Published in: | New Journal of Physics |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2014-01-01
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| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/16/11/113054 |
| _version_ | 1852815138735783936 |
|---|---|
| author | Sanaz Sadegh Eli Barkai Diego Krapf |
| author_facet | Sanaz Sadegh Eli Barkai Diego Krapf |
| author_sort | Sanaz Sadegh |
| collection | DOAJ |
| container_title | New Journal of Physics |
| description | The power spectrum of quantum dot (QD) fluorescence exhibits $1/{{f}^{\beta }}$ noise, related to the intermittency of these nanosystems. As in other systems exhibiting $1/f$ noise, this power spectrum is not integrable at low frequencies, which appears to imply infinite total power. We report measurements of individual QDs that address this long-standing paradox. We find that the level of $1/{{f}^{\beta }}$ noise decays with the observation time. The change of the spectrum with time places a bound on the total power. These observations are in stark contrast with most measurements of noise in macroscopic systems which do not exhibit any evidence for non-stationarity. We show that the traditional description of the power spectrum with a single exponent β is incomplete and three additional critical exponents characterize the dependence on experimental time. |
| format | Article |
| id | doaj-art-4ed241eff3e44909a2bcd3d546d18607 |
| institution | Directory of Open Access Journals |
| issn | 1367-2630 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| spelling | doaj-art-4ed241eff3e44909a2bcd3d546d186072025-08-19T20:34:27ZengIOP PublishingNew Journal of Physics1367-26302014-01-01161111305410.1088/1367-2630/16/11/1130541/f noise for intermittent quantum dots exhibits non-stationarity and critical exponentsSanaz Sadegh0Eli Barkai1Diego Krapf2Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80523, USADepartment of Physics, Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Ramat-Gan 52900, IsraelDepartment of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80523, USA; School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USAThe power spectrum of quantum dot (QD) fluorescence exhibits $1/{{f}^{\beta }}$ noise, related to the intermittency of these nanosystems. As in other systems exhibiting $1/f$ noise, this power spectrum is not integrable at low frequencies, which appears to imply infinite total power. We report measurements of individual QDs that address this long-standing paradox. We find that the level of $1/{{f}^{\beta }}$ noise decays with the observation time. The change of the spectrum with time places a bound on the total power. These observations are in stark contrast with most measurements of noise in macroscopic systems which do not exhibit any evidence for non-stationarity. We show that the traditional description of the power spectrum with a single exponent β is incomplete and three additional critical exponents characterize the dependence on experimental time.https://doi.org/10.1088/1367-2630/16/11/1130541/f noisenanocrystalsblinkingpower spectrum05.40.-a78.67.Hc |
| spellingShingle | Sanaz Sadegh Eli Barkai Diego Krapf 1/f noise for intermittent quantum dots exhibits non-stationarity and critical exponents 1/f noise nanocrystals blinking power spectrum 05.40.-a 78.67.Hc |
| title | 1/f noise for intermittent quantum dots exhibits non-stationarity and critical exponents |
| title_full | 1/f noise for intermittent quantum dots exhibits non-stationarity and critical exponents |
| title_fullStr | 1/f noise for intermittent quantum dots exhibits non-stationarity and critical exponents |
| title_full_unstemmed | 1/f noise for intermittent quantum dots exhibits non-stationarity and critical exponents |
| title_short | 1/f noise for intermittent quantum dots exhibits non-stationarity and critical exponents |
| title_sort | 1 f noise for intermittent quantum dots exhibits non stationarity and critical exponents |
| topic | 1/f noise nanocrystals blinking power spectrum 05.40.-a 78.67.Hc |
| url | https://doi.org/10.1088/1367-2630/16/11/113054 |
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