量子電腦 - 中研院物理研究所
量子電腦 - 中研院物理研究所
量子電腦 - 中研院物理研究所
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Electron spins in quantum dots<br />
Top electrical gates define quantum dots in 2DEG.<br />
• Coulomb blockade confines excessive electron number at one per<br />
dot.<br />
Spins of electrons are qubits.<br />
• Qubits can be addressed individually:<br />
‣ Back gates can move electrons into magnetized or high-g layer<br />
to produce locally different Zeeman splitting.<br />
‣ Or a current wire can produce magnetic field gradient.<br />
• Exchange coupling is controlled by electrically lowing the tunnel<br />
barrier between dots
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