Patent ID: 7956348

Claim:
A quantum device, in a real space where a given first direction is defined, comprising: a first quantum structure area and a second quantum structure area, the areas confining a carrier at least in the first direction, a tunnel barrier area between the first quantum structure area and the second quantum structure area, a first electrode area for injecting a carrier into the first quantum structure area from a direction not disturbing a quantum confined state in the first direction of the first quantum structure area, the direction being parallel to a plane perpendicular to the first direction, a second electrode area for injecting a carrier into the second quantum structure area from a direction not disturbing a quantum confined state in the first direction of the second quantum structure area, the direction being parallel to a plane perpendicular to the first direction, a carrier conduction area, and an isolation area arranged between the first quantum structure area and the carrier conduction area, such that a voltage applied to the carrier conduction area changes I-V characteristics between the first electrode area and the second electrode area.