Individual Control and Readout of Qubits in a Sub-Diffraction Volume
arXiv:1805.06884 · doi:10.1038/s41534-019-0154-y
Abstract
Medium-scale ensembles of coupled qubits offer a platform for near-term quantum technologies including computing, sensing, and the study of mesoscopic quantum systems. Atom-like emitters in solids have emerged as promising quantum memories, with demonstrations of spin-spin entanglement by optical and magnetic interactions. Magnetic coupling in particular is attractive for efficient and deterministic entanglement gates, but raises the problem of individual spin addressing at the necessary nanometer-scale separation. Current super-resolution techniques can reach this resolution, but are destructive to the states of nearby qubits. Here, we demonstrate the measurement of individual qubit states in a sub-diffraction cluster by selectively exciting spectrally distinguishable nitrogen vacancy (NV) centers. We demonstrate 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 . 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.
arXiv comment7 pages, 4 figures + supplementary information
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Cited by in corpus (13)
- Large-scale integration of near-indistinguishable artificial atoms in hybrid photonic circuits
- Quantum networks based on color centers in diamond
- Telecom networking with a diamond quantum memory
- Directional detection of dark matter with diamond
- Quantum information processing with closely-spaced diamond color centers in strain and magnetic fields
- An integrated photonic engine for programmable atomic control
- Electric-Field Programmable Spin Arrays for Scalable Quantum Repeaters
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- NV microscopy of thermally controlled stresses caused by CrO thin films
- Finding the nitrogen-vacancy singlet manifold energy level using charge conversion pulse sequences
- Wideband covariance magnetometry below the diffraction limit
- High resolution imaging with anomalous saturated excitation