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The traces show the results with different conductance of the sensors (sensor 1 from 0.88 to 0.19 e| from the resonance circuit measured by the setup of Fig. We observe dips caused by the resonance circuits including sensor 1 and sensor 2 at 207 MHz and 240 MHz respectively.
We can detect the change of the sensor conductance through the reflected signal: |S/h (the blue traces).
The gate performance of the measured stability diagram is well reproduced by a capacitance model.
Here we confirm that couplings between distant dots are small, because the corresponding charging lines just cross with each other with no anticrossing.
The left (right) dip is caused by the resonator including sensor 1 (sensor 2).
The center dip is caused by an unused resonator not connected to the device.
To read out the reflected signals at different frequencies, the room temperature part of the measurement circuit is configured by two sets of local oscillators and mixers (Fig. In this room temperature circuit, two RF carriers are combined and the reflected signal of each charge sensor is picked up by the mixer operating at each carrier frequency simultaneously. The authors declare no competing financial interests. This work is licensed under a Creative Commons Attribution 4.0 International License.
Note that simultaneous readout may be important for measurement of temporal correlation of charge or spin between different dots) are shown in Fig. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material.
The 5QD can be tuned by separating it into two TQDs since QDWe use the gate voltage setting derived from Fig.