Circuit manufacturing method and superconducting circuit

A superconducting circuit comprising:

• a substrate;
• first superconductor layers arranged on the substrate in a line shape in a predetermined direction with a predetermined gap therebetween, a surface of each of the first superconductor layers being covered with an oxide film;
• and
• second superconductor layers arranged on the substrate and the first superconductor layers in a line shape in the predetermined direction with the predetermined gap therebetween, the pattern in which the second superconductor layers are arranged being displaced from the pattern in which the first superconductor layers are arranged, wherein
• the superconducting circuit include a plurality of Josephson junctions formed by parts where the first superconductor layers and the second superconductor layers overlap each other via the oxide film,
• the plurality of Josephson junctions include:
• a first Josephson junction having a first area;
• a second Josephson junction having a second area;
• at least one third Josephson junction each having a third area and between the first Josephson junction and the second Josephson junction;
• and
• a plurality of fourth Josephson junctions each having a fourth area and between the first Josephson junction and the second Josephson junction,
• the third area is larger than the fourth area,
• the number of the at least one third Josephson junction each having the third area is an odd number and the total number of the at least one third Josephson junction having the third area and the plurality of fourth Josephson junctions each having the fourth area is an odd number as well, and
• the superconducting circuit includes a first series circuit in which the at least one third Josephson junction each having the third area and the plurality of fourth Josephson junctions each having the fourth area are connected in series.