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I'm interested in learning how Josephson Junctions can be utilized to create invertible logic gates. To me it's not clear how the Junctions provide any logical capability (they simply allow for a current flow across an insulating channel but lack any switch type mechanism).

Link to Josephson Effect: https://en.wikipedia.org/wiki/Josephson_effect

Does anyone have a circuit diagram of a NOT gate implemented purely using josephson junctions and wires? I'm hoping to find something similar to the famous CMOS not-gate diagram below: (source: https://en.wikipedia.org/wiki/Inverter_(logic_gate))

enter image description here

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  • \$\begingroup\$ Isn't something that allows current to flow conditionally the same as a MOSFET or other transistor in principle? \$\endgroup\$
    – Andy aka
    Commented Apr 23, 2020 at 14:35
  • \$\begingroup\$ I don't believe it allows current to flow conditionally. My understanding is a superconducting current can unconditionally flow through a josephson junction. So this is where I get confused as to how create a transistor or some other logical element out of it \$\endgroup\$
    – Sidharth Ghoshal
    Commented Apr 23, 2020 at 14:36
  • \$\begingroup\$ Please read a little about J-junctions. \$\endgroup\$
    – Andy aka
    Commented Apr 23, 2020 at 14:39

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You need a controllable switch type element to create logic functions of any kind. J-junctions do not seem to provide that.

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