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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Measuring cotunneling in its wake
AU - Zilberberg, Oded
AU - Carmi, Assaf
AU - Romito, Alessandro
N1 - 15 pages, 9 figures, 1 appendix, published version
PY - 2014/11/11
Y1 - 2014/11/11
N2 - 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.
AB - 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.
KW - cond-mat.mes-hall
KW - quant-ph
U2 - 10.1103/PhysRevB.90.205413
DO - 10.1103/PhysRevB.90.205413
M3 - Journal article
VL - 90
JO - Physical review B
JF - Physical review B
SN - 2469-9950
IS - 20
M1 - 205413
ER -