Title:
量子コンピュータ
Document Type and Number:
Japanese Patent JP4213892
Kind Code:
B2
Abstract:
A quantum computer (57) comprises a trench-isolated channel region (2) formed in a boron-doped silicon germanium layer which has narrow channel regions (7, 8, 9) which form tunnel barriers and wide channel regions (10, 11) which define first and second quantum dots (10, 11). Tunnelling between the first and second quantum dots is controlled by a side gate (58) and/or a surface gate (69). The quantum states used to represent a qubit may be defined as an excess hole on the first quantum dot&rang& and an excess hole on the second quantum dot&rang&. A Hadamard Transformation UH of an initial state maybe effected by application of a pulse to the side or surface gate. The first and second tunnel quantum dots are of unequal size which helps decouple the quantum computer from the environment.
Inventors:
David Alfon William
Paul Cain
Paul Cain
Application Number:
JP2002000785A
Publication Date:
January 21, 2009
Filing Date:
January 07, 2002
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G06E1/00; H01L29/66; G06N99/00; H01L29/06
Domestic Patent References:
| JP2000150862A | ||||
| JP2000068495A | ||||
| JP2001144283A | ||||
| JP200121932A |
Attorney, Agent or Firm:
Polaire Patent Business Corporation
Katsuo Ogawa
Kyosuke Tanaka
Takashi Sasaki
Katsuo Ogawa
Kyosuke Tanaka
Takashi Sasaki