電子スピン制御と量子情報デバイス

摘要

Recent progress in the control of electronic spin effects in single and double quantum dots and applications of such quantum dots to spin-based quantum computing is reviewed. Electronic spin in quantum dots is such a robust quantum number that novel spin effects including slow relaxation and Pauli spin blockade, can be demonstrated well. These features are favorable for implementing the fundamental elements of quantum computing, i.e., manipulation of qubits and quantum logic gates, readout, initialization, decoherence, and scalability. The current status in developing these elements with semiconductor quantum dots is reviewed, referring to our recent work on developments in new spin qubit devices.