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Schematic view of the experimental soliton transistor, in which and process are used to fabricate three LJJs. The base electrode is Nb, the counter electrode of the left LJJ is Nb, while those of the top and left LJJs are Pb. An Al coupling resistor connects the left and right LJJs. The paths of solitons and antisolitons are shown by the thick line. Bias currents are shown by thick arrows and control currents are designated as through and are shown by dashed arrows. All control currents can be applied via separate control lines. The path of solitons and the ON and OFF states are shown at the bottom again for clarity.
Experimental curves of soliton transistor: (a) curve of the left LJJ with and without antisolitons and (b) curves of the right LJJ with and without the introduction of antisolitons.
The biasing and operational principle of the soliton transistor is shown. The control current of Fig. 1 plays the role of the input current which controls the state of the transistor. The voltage at the right LJJ is the output through which a loading resistor can provide an output current. This output current can be applied to the input of several other transistors to control their state. Soliton transistor can be considered as a current-controlled voltage source for circuit applications.
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