Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.126803
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Funding
- DFG
- Joint Research Project Quantum Ampere'' within the European Metrology Research Programme (EMRP) [JRP SIB07]
- EMRP participating countries within EURAMET
- European Union
- ESF [2009/0216/1DP/1.1.1.2.0/09/APIA/VIAA/044]
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We report noninvasive single-charge detection of the full probability distribution P-n of the initialization of a quantum dot with n electrons for rapid decoupling from an electron reservoir. We analyze the data in the context of a model for sequential tunneling pinch-off, which has generic solutions corresponding to two opposing mechanisms. One limit considers sequential freeze-out'' of an adiabatically evolving grand canonical distribution, the other one is an athermal limit equivalent to the solution of a generalized decay cascade model. We identify the athermal capturing mechanism in our sample, testifying to the high precision of our combined theoretical and experimental methods. The distinction between the capturing mechanisms allows us to derive efficient experimental strategies for improving the initialization. DOI: 10.1103/PhysRevLett.110.126803
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