Measuring cotunneling in its wake

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2014
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Carmi, Assaf
Romito, Alessandro
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We introduce a rate formalism to treat classically forbidden electron transport through a quantum dot (cotunneling) in the presence of a coupled measurement device. We demonstrate this formalism for a toy model case of cotunneling through a single-level dot while being coupled to a strongly pinched-off quantum point contact (QPC). We find that the detector generates three types of back-action: the measurement collapses the coherent transport through the virtual state, but at the same time allows for QPC-assisted incoherent transport, and widens the dot level. Last, we obtain the measured cotunneling time from the cross correlation between dot and QPC currents.

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ISO 690ZILBERBERG, Oded, Assaf CARMI, Alessandro ROMITO, 2014. Measuring cotunneling in its wake. In: Physical Review B. American Physical Society (APS). 2014, 90(20), 205413. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.90.205413
BibTex
@article{Zilberberg2014Measu-54927,
  year={2014},
  doi={10.1103/PhysRevB.90.205413},
  title={Measuring cotunneling in its wake},
  number={20},
  volume={90},
  issn={2469-9950},
  journal={Physical Review B},
  author={Zilberberg, Oded and Carmi, Assaf and Romito, Alessandro},
  note={Article Number: 205413}
}
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