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Photon-assisted tunneling and charge dephasing in a carbon nanotube double quantum dot

Abstract:

We report microwave-driven photon-assisted tunneling in a suspended carbon nanotube double quantum dot. From the resonant linewidth at a temperature of 13 mK, the charge-dephasing time is determined to be 280 ± 30 ps. The linewidth is independent of driving frequency, but increases with increasing temperature. The moderate temperature dependence is inconsistent with expectations from electron-phonon coupling alone, but consistent with charge noise arising in the device. The extracted level of...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted manuscript

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Publisher copy:
10.1103/PhysRevB.93.235428

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Institution:
University of Oxford
Department:
Oxford, MPLS, Materials
Role:
Author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Materials
Role:
Author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Materials
Role:
Author
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Templeton World Charity Foundation More from this funder
Marie Curie Career Integration Grant More from this funder
Royal Society of Edinburgh More from this funder
Scottish Government More from this funder
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Publisher:
American Physical Society Publisher's website
Journal:
Physical Review B Journal website
Publication date:
2016-06-05
DOI:
ISSN:
2469-9969
URN:
uuid:ecf47df6-a494-466d-9aa0-8ef1b9fc63ca
Source identifiers:
629287
Local pid:
pubs:629287

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