Quantum semiconductor device employing quantum boxes for enabling compact size and high-speed operation

摘要

A quantum semiconductor device has a semiconductor substrate (30), a plurality of quantum boxes (2, 4; 6, 8; 12, 14) formed adjacent to one another in the semiconductor substrate (30), and a quantum level control unit (1) for changing the effective size of at least one (4, 8, 14) of the quantum boxes (2, 4; 6, 8), to thereby change the quantum level of each of the quantum boxes (2, 4; 6, 8). Consequently, according to the present invention, an influence of charges due to peripheral impurities is small, and thereby a compact quantum semiconductor device can be provided. Further, according to the present invention, a highly integrated high-speed switching circuit can be provided.