Phonon Effects on the Weak Measurement of Charge States in Quantum Dots with a Quantum Point Contact |
| Ł. Marcinowski a, M. Krzyżosiaka, K. Roszaka,b, P. Machnikowski a, R. Buczko c and J. Mostowski c
aInstitute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland bDepartment of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, 12116 Prague, Czech Republic cInstitute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland |
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| We study theoretically the process of a weak measurement of charge states in a double quantum dot performed by coupling to a quantum point contact. We focus on the interplay of the measurement process with phonon-induced dephasing of delocalized superpositions of electron states and compare the time scales relevant for the dynamics of the open system and for the measurement process: the decoherence rate, the localization rate of the state conditioned on the measurement outcome and the time scale on which information on the system state is gained in the process of the measurement. |
| DOI: 10.12693/APhysPolA.119.640 PACS numbers: 73.63.Kv, 03.65.Ta, 63.20.kd |