title: Counting statistics for electron capture in a dynamic quantum dot.
abstract: 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.
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors.forename: Lukas
authors.initials: L
authors.lastname: Fricke
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Wulf
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Kaestner
authors.affiliation: Faculty of Computing, University of Latvia, Riga LV-1586, Latvia and Faculty of Physics and Mathematics, University of Latvia, Riga LV-1002, Latvia.
authors.forename: Vyacheslavs
authors.initials: V
authors.lastname: Kashcheyevs
authors.affiliation: Faculty of Computing, University of Latvia, Riga LV-1586, Latvia and Faculty of Physics and Mathematics, University of Latvia, Riga LV-1002, Latvia.
authors.forename: Janis
authors.initials: J
authors.lastname: Timoshenko
authors.affiliation: Faculty of Computing, University of Latvia, Riga LV-1586, Latvia and Faculty of Physics and Mathematics, University of Latvia, Riga LV-1002, Latvia.
authors.forename: Pavel
authors.initials: P
authors.lastname: Nazarov
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Hohls
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors.forename: Philipp
authors.initials: P
authors.lastname: Mirovsky
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors.forename: Brigitte
authors.initials: B
authors.lastname: Mackrodt
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors.forename: Ralf
authors.initials: R
authors.lastname: Dolata
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Weimann
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors.forename: Klaus
authors.initials: K
authors.lastname: Pierz
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors.forename: Hans W
authors.initials: HW
authors.lastname: Schumacher