Quantum computer
US6635898B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2001 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Nov 19, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D48/3835
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
A quantum computer comprises a trench-isolated channel region formed in a boron-doped silicon germanium layer which has narrow channel regions which form tunnel barriers and wide channel regions which define first and second quantum dots. Tunnelling between the first and second quantum dots is controlled by a side gate and/or a surface gate. The quantum states used to represent a qubit may be defined as |an excess hole on the first quantum dot> and |an excess hole on the second quantum dot>. A Hadamard Transformation UH of an initial state may be 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.