Charge state manipulation of qubits in diamond.
Charge state manipulation of qubits in diamond.
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DOI:
10.1038/ncomms1729
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发表时间:
2012-03-06
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
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The nitrogen-vacancy (NV) centre in diamond is a promising candidate for a solid-state qubit. However, its charge state is known to be unstable, discharging from the qubit state NV− into the neutral state NV0 under various circumstances. Here we demonstrate that the charge state can be controlled by an electrolytic gate electrode. This way, single centres can be switched from an unknown non-fluorescent state into the neutral charge state NV0, and the population of an ensemble of centres can be shifted from NV0 to NV−. Numerical simulations confirm the manipulation of the charge state to be induced by the gate-controlled shift of the Fermi level at the diamond surface. This result opens the way to a dynamic control of transitions between charge states and to explore hitherto inaccessible states, such as NV+. Point defects in diamond in the form of nitrogen vacancy centres are believed to be promising candidates for qubits in quantum computers. Grotz et al. present a method for manipulating the charge state of nitrogen vacancies using an electrolytic gate electrode.
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影响因子:
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DOI:
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