Abstrakti
We present a study of current fluctuations in two models proposed as quantum shuttles. Based on a numerical evaluation of the first three cumulants of the full counting statistics we have recently shown that a giant enhancement of the zero-frequency current noise in a single-dot quantum shuttle can be explained in terms of a bistable switching between two current channels. By applying the same method to a quantum shuttle consisting of a vibrating quantum dot array, we show that the same mechanism is responsible for a giant enhancement of the noise in this model, although arising from very different physics. The interpretation is further supported by a numerical evaluation of the finite-frequency noise. For both models we give numerical results for the effective switching rates.
Alkuperäiskieli | Englanti |
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Otsikko | NOISE AND FLUCTUATIONS: 18TH INTERNATIONAL CONFERENCE ON NOISE AND FLUCTUATIONS - ICNF 2005 |
Toimittajat | Tomas Gonzalez , Javier Mateos , Daniel Pardo |
Kustantaja | American Institute of Physics |
Sivut | 442-445 |
Sivumäärä | 4 |
ISBN (painettu) | 0-7354-0267-1 |
DOI - pysyväislinkit | |
Tila | Julkaistu - elok. 2005 |
OKM-julkaisutyyppi | A4 Artikkeli konferenssijulkaisussa |
Tapahtuma | International Conference on Noise and Fluctuations - Tokyo, Japani Kesto: 9 syysk. 2007 → 14 syysk. 2007 Konferenssinumero: 19 |
Julkaisusarja
Nimi | AIP Conference Proceedubgs |
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Kustantaja | American Institute of Physics |
Vuosikerta | 780 |
ISSN (painettu) | 0094-243X |
ISSN (elektroninen) | 1551-7616 |
Conference
Conference | International Conference on Noise and Fluctuations |
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Maa/Alue | Japani |
Kaupunki | Tokyo |
Ajanjakso | 09/09/2007 → 14/09/2007 |