|
Hokkaido University Collection of Scholarly and Academic Papers >
Research Center for Integrated Quantum Electronics >
Peer-reviewed Journal Articles, etc >
State tomography of a chain of qubits embedded in a spin field-effect transistor via repeated spin-blockade measurements on the edge qubit
| Title: | State tomography of a chain of qubits embedded in a spin field-effect transistor via repeated spin-blockade measurements on the edge qubit |
| Authors: | Yuasa, Kazuya Browse this author | | Okano, Kosuke Browse this author | | Nakazato, Hiromichi Browse this author | | Kashiwada, Saori Browse this author | | Yoh, Kanji Browse this author →KAKEN DB |
| Keywords: | PACS=03.65.Wj | | PACS=85.75.Hh | | PACS=72.25.Hg | | PACS=03.67.Lx |
| Issue Date: | Feb-2009 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review. B, Condensed Matter and Materials Physics |
| Volume: | 79 |
| Issue: | 7 |
| Start Page: | 075318 |
| Publisher DOI: | 10.1103/PhysRevB.79.075318 |
| Abstract: | As a possible physical realization of a quantum information processor, a system with stacked self-assembled InAs quantum dots buried in GaAs adjacent to the channel of a spin field-effect transistor has been proposed. In this system, only one of the stacked qubits, i.e., the edge qubit (the qubit closest to the channel), is measurable via "spin-blockade measurement." It is shown that the state tomography of the whole chain of the qubits is still possible even under such a restricted accessibility. The idea is to make use of the entangling dynamics of the qubits. A recipe for the two-qubit system is explicitly constructed and the effect of an imperfect fidelity of the measurement is clarified. A general scheme for multiple qubits based on repeated measurements is also presented. |
| Rights: | © 2009 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/38125 |
| Appears in Collections: | 量子集積エレクトロニクス研究センター (Research Center for Integrated Quantum Electronics) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 陽 完治
|
