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Vacuum-field-induced THz transport gap in a carbon nanotube quantum dot.

ABSTRACT: The control of light-matter interaction at the most elementary level has become an important resource for quantum technologies. Implementing such interfaces in the THz range remains an outstanding problem. Here, we couple a single electron trapped in a carbon nanotube quantum dot to a THz resonator. The resulting light-matter interaction reaches the deep strong coupling regime that induces a THz energy gap in the carbon nanotube solely by the vacuum fluctuations of the THz resonator. This is directly confirmed by transport measurements. Such a phenomenon which is the exact counterpart of inhibition of spontaneous emission in atomic physics opens the path to the readout of non-classical states of light using electrical current. This would be a particularly useful resource and perspective for THz quantum optics.

SUBMITTER: Valmorra F

PROVIDER: S-EPMC8446012 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature

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Vacuum-field-induced THz transport gap in a carbon nanotube quantum dot.

Valmorra F F Yoshida K K Contamin L C LC Messelot S S Massabeau S S Delbecq M R MR Dartiailh M C MC Desjardins M M MM Cubaynes T T Leghtas Z Z Hirakawa K K Tignon J J Dhillon S S Balibar S S Mangeney J J Cottet A A Kontos T T

Nature communications 20210916 1

The control of light-matter interaction at the most elementary level has become an important resource for quantum technologies. Implementing such interfaces in the THz range remains an outstanding problem. Here, we couple a single electron trapped in a carbon nanotube quantum dot to a THz resonator. The resulting light-matter interaction reaches the deep strong coupling regime that induces a THz energy gap in the carbon nanotube solely by the vacuum fluctuations of the THz resonator. This is dir ...[more]

PMID: 34531384

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