(^9) %5 P9
7 4
V
(^9) %5 P9
7 4
V
DE
Extended Data Fig. 8 | Relaxation time T 1 as a function of gate voltage on the
tunnel barriers between dot and reservoir. a, b, The relaxation time T 1 of the
dots increases approximately exponentially as a function of the respective
dot–reservoir gate voltage, for Q1 (a) as well as for Q2 (b). The relaxation time of
Q1 increases exponentially from T 1 < 1 μs to T 1 > 10 μs, and a similar scaling is
observed for Q2. For even smaller dot–reservoir couplings, the transport signal
drops below our measurement limit, but switching to charge sensing could
allow a further increase in T 1.