Abstract
One of key devices for quantum repeater system is a quantum interface that enables quantum state transfer (QST) from a messenger photon qubit to a processor electron spin qubit. To realize QST, it is necessary to fabricate a quantum dot, whose electron g -factor should be tuned to zero and to measure the local g -factor of single electron precisely without disturbing the state. We have measured the random telegraph signals (RTS) to investigate a g -factor of the quantum dot which is naturally created by a defect in the vicinity of source-drain channel. We have succeeded to detect single electron charge trapping and releasing events electrically and to measure magnetic-field dependent Zeeman shift. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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