Details
| Original language | English |
|---|---|
| Pages (from-to) | 330-334 |
| Number of pages | 5 |
| Journal | Nature physics |
| Volume | 15 |
| Issue number | 4 |
| Early online date | 4 Feb 2019 |
| Publication status | Published - 1 Apr 2019 |
Abstract
In stochastic resonance, the combination of a weak signal with noise leads to its amplification and optimization 1 . This phenomenon has been observed in several systems in contexts ranging from palaeoclimatology, biology, medicine, sociology and economics to physics 1–9 . In all these cases, the systems were either operating in the presence of thermal noise or were exposed to external classical noise sources. For quantum-mechanical systems, it has been theoretically predicted that intrinsic fluctuations lead to stochastic resonance as well, a phenomenon referred to as quantum stochastic resonance 1,10,11 , but this has not been reported experimentally so far. Here we demonstrate tunnelling-controlled quantum stochastic resonance in the a.c.-driven charging and discharging of single electrons on a quantum dot. By analysing the counting statistics 12–16 , we demonstrate that synchronization between the sequential tunnelling processes and a periodic driving signal passes through an optimum, irrespective of whether the external frequency or the internal tunnel coupling is tuned.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Nature physics, Vol. 15, No. 4, 01.04.2019, p. 330-334.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Quantum stochastic resonance in an a.c.-driven single-electron quantum dot
AU - Wagner, Timo
AU - Talkner, Peter
AU - Bayer, Johannes
AU - Rugeramigabo, Eddy Patrick
AU - Hänggi, Peter
AU - Haug, Rolf J.
N1 - Funding information: This work was supported financially by the Research Training Group 1991 (DFG), the School for Contacts in Nanosystems (NTH), the Center for Quantum Engineering and Space-Time Research (QUEST), the Laboratory for Nano and Quantum Engineering (LNQE) and the ‘Fundamentals of Physics and Metrology’ initiative (T.W, J.C.B., E.R. and R.J.H.).
PY - 2019/4/1
Y1 - 2019/4/1
N2 - In stochastic resonance, the combination of a weak signal with noise leads to its amplification and optimization 1 . This phenomenon has been observed in several systems in contexts ranging from palaeoclimatology, biology, medicine, sociology and economics to physics 1–9 . In all these cases, the systems were either operating in the presence of thermal noise or were exposed to external classical noise sources. For quantum-mechanical systems, it has been theoretically predicted that intrinsic fluctuations lead to stochastic resonance as well, a phenomenon referred to as quantum stochastic resonance 1,10,11 , but this has not been reported experimentally so far. Here we demonstrate tunnelling-controlled quantum stochastic resonance in the a.c.-driven charging and discharging of single electrons on a quantum dot. By analysing the counting statistics 12–16 , we demonstrate that synchronization between the sequential tunnelling processes and a periodic driving signal passes through an optimum, irrespective of whether the external frequency or the internal tunnel coupling is tuned.
AB - In stochastic resonance, the combination of a weak signal with noise leads to its amplification and optimization 1 . This phenomenon has been observed in several systems in contexts ranging from palaeoclimatology, biology, medicine, sociology and economics to physics 1–9 . In all these cases, the systems were either operating in the presence of thermal noise or were exposed to external classical noise sources. For quantum-mechanical systems, it has been theoretically predicted that intrinsic fluctuations lead to stochastic resonance as well, a phenomenon referred to as quantum stochastic resonance 1,10,11 , but this has not been reported experimentally so far. Here we demonstrate tunnelling-controlled quantum stochastic resonance in the a.c.-driven charging and discharging of single electrons on a quantum dot. By analysing the counting statistics 12–16 , we demonstrate that synchronization between the sequential tunnelling processes and a periodic driving signal passes through an optimum, irrespective of whether the external frequency or the internal tunnel coupling is tuned.
UR - http://www.scopus.com/inward/record.url?scp=85061175655&partnerID=8YFLogxK
U2 - 10.1038/s41567-018-0412-5
DO - 10.1038/s41567-018-0412-5
M3 - Article
AN - SCOPUS:85061175655
VL - 15
SP - 330
EP - 334
JO - Nature physics
JF - Nature physics
SN - 1745-2473
IS - 4
ER -