Details
| Original language | English |
|---|---|
| Article number | 292 |
| Journal | Communications Physics |
| Volume | 5 |
| Issue number | 1 |
| Publication status | Published - 18 Nov 2022 |
Abstract
Quantum systems as used for quantum computation or quantum sensing are nowadays often realized in solid state devices as e.g. complex Josephson circuits or coupled quantum-dot systems. Condensed matter as an environment influences heavily the quantum coherence of such systems. Here, we investigate electron transport through asymmetrically coupled InAs double quantum dots and observe an extremely strong temperature dependence of the coherent current peaks of single-electron tunneling. We analyze experimentally and theoretically the broadening of such coherent current peaks up to temperatures of 20K and we are able to model it with quantum dissipation being due to two different bosonic baths. These bosonic baths mainly originate from substrate phonons. Application of a magnetic field helps us to identify the different quantum dot states through their temperature dependence.
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Communications Physics, Vol. 5, No. 1, 292, 18.11.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Temperature-dependent broadening of coherent current peaks in InAs double quantum dots
AU - Dani, Olfa
AU - Hussein, Robert
AU - Bayer, Johannes C.
AU - Kohler, Sigmund
AU - Haug, Rolf J.
N1 - Funding Information: O.D., J.C.B., and R.J.H. acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy -EXC 2123 QuantumFrontiers-390837967 and the State of Lower Saxony of Germany via the Hannover School for Nanotechnology. S.K. acknowledges financial support by the Spanish Ministry of Science and Innovation through Grant. No. PID2020-117787GB-I00 and the CSIC Research Platform on Quantum Technologies PTI-001. We thank Klaus Pierz and Peter Hinze for heterostructure growth and transmission electron microscope investigations and Jan Kühne and Felix Opiela for contributions at the beginning of the project.
PY - 2022/11/18
Y1 - 2022/11/18
N2 - Quantum systems as used for quantum computation or quantum sensing are nowadays often realized in solid state devices as e.g. complex Josephson circuits or coupled quantum-dot systems. Condensed matter as an environment influences heavily the quantum coherence of such systems. Here, we investigate electron transport through asymmetrically coupled InAs double quantum dots and observe an extremely strong temperature dependence of the coherent current peaks of single-electron tunneling. We analyze experimentally and theoretically the broadening of such coherent current peaks up to temperatures of 20K and we are able to model it with quantum dissipation being due to two different bosonic baths. These bosonic baths mainly originate from substrate phonons. Application of a magnetic field helps us to identify the different quantum dot states through their temperature dependence.
AB - Quantum systems as used for quantum computation or quantum sensing are nowadays often realized in solid state devices as e.g. complex Josephson circuits or coupled quantum-dot systems. Condensed matter as an environment influences heavily the quantum coherence of such systems. Here, we investigate electron transport through asymmetrically coupled InAs double quantum dots and observe an extremely strong temperature dependence of the coherent current peaks of single-electron tunneling. We analyze experimentally and theoretically the broadening of such coherent current peaks up to temperatures of 20K and we are able to model it with quantum dissipation being due to two different bosonic baths. These bosonic baths mainly originate from substrate phonons. Application of a magnetic field helps us to identify the different quantum dot states through their temperature dependence.
UR - http://www.scopus.com/inward/record.url?scp=85142258146&partnerID=8YFLogxK
U2 - 10.1038/s42005-022-01074-z
DO - 10.1038/s42005-022-01074-z
M3 - Article
VL - 5
JO - Communications Physics
JF - Communications Physics
SN - 2399-3650
IS - 1
M1 - 292
ER -