The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 2004
Filed:
Mar. 19, 2002
Toshio Ohshima, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The quantum circuit device comprises: an asymmetrical coupled quantum dot of a main quantum dot and an operational quantum dot of a smaller size than the main quantum dot ; an asymmetrical coupled quantum dot of a main quantum dot arranged at a distance which does not permit to substantially tunnel from the main quantum dot , and an operation quantum dot having a smaller size than the main quantum dot and arranged at a distance which permits tunneling from the operational quantum dot ; and a laser device for applying to the asymmetrical coupled quantum dots a laser beam of a wavelength which resonates an inter-level energy the asymmetrical coupled quantum dots. In the sleep state, electron is present at the ground state of the main quantum dot, where no exchange interaction takes place, and in an operation, the electron is transited to an excited state of the operational quantum dot, whereby the operation is made by the exchange interactions between the adjacent operational quantum dots. Thus, relatively stable operations can be made.