期刊
NPJ QUANTUM INFORMATION
卷 5, 期 -, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41534-019-0154-y
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资金
- NASA Space Technology Research Fellowship
- NSF Center for Ultracold Atoms (CUA)
- STC Center for Integrated Quantum Materials (CIQM), NSF [DMR-1231319]
- Army Research Laboratory Center for Distributed Quantum Information (CDQI)
- Master Dynamic Limited
- NSF EFRI-ACQUIRE program Scalable Quantum Communications with Error-Corrected Semiconductor Qubits
- AFOSR Quantum Memories MURI
- European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant [753067]
- Federal Ministry of Education and Research of Germany (BMBF, DiNOQuant) [13N14921]
- AFOSR MURI for Optimal Measurements for Scalable Quantum Technologies [FA9550-14-1-0052]
- AFOSR program [FA9550-16-1-0391]
- Marie Curie Actions (MSCA) [753067] Funding Source: Marie Curie Actions (MSCA)
Medium-scale ensembles of coupled qubits offer a platform for near-term quantum technologies as well as studies of many-body physics. A central challenge for coherent control of such systems is the ability to measure individual quantum states without disturbing nearby qubits. Here, we demonstrate the measurement of individual qubit states in a sub-diffraction cluster by selectively exciting spectrally distinguishable nitrogen vacancy centers. We perform super-resolution localization of single centers with nanometer spatial resolution, as well as individual control and readout of spin populations. These measurements indicate a readout-induced crosstalk on non-addressed qubits below 4 x 10(-2). This approach opens the door to high-speed control and measurement of qubit registers in mesoscopic spin clusters, with applications ranging from entanglement-enhanced sensors to error-corrected qubit registers to multiplexed quantum repeater nodes.
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