Quantum gates based on electron spins of triple quantum dot

被引：3
|
作者：
Sasakura, H
Adachi, S
Muto, S
机构：
[1] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, Japan
[2] CREST, Japan Sci & Technol Corp, Sapporo, Hokkaido 0608628, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2003年 / 42卷 / 10期
关键词：
quantum dot; quantum computation; photon-assisted tunnelling;
D O I：
10.1143/JJAP.42.6308
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Quantum computation using electron spins in three-coupled dots of different sizes is proposed. By using photon-assisted tunnelling, Coulomb blockade and spin rotation of electrons, logic gates are realized by static and rotational magnetic fields and resonant optical pulses. The two-bit CNOT is numerically demonstrated by the time evolution of the density matrix. In addition, the Hamiltonian is described using pseudo-spin representation and the phase change during the gate operation is discussed.
引用
收藏
页码：6308 / 6313
页数：6
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