Quantum coherence control at near 1000 K
arXiv:1810.13089 · doi:10.1038/s41467-019-09327-2
Abstract
Quantum coherence control usually requires extremely low temperature environments. Even for spins in diamond, a remarkable exception, the coherence signal is lost as temperature approaches 700 K. Here we demonstrate quantum coherence control of the electron spins of nitrogen-vacancy centers in nanodiamonds at temperatures near 1000 K. The scheme is based on initialization and readout of the spins at room temperature and control at high temperature, which is enabled by pulse laser heating and rapid diffusion cooling of nanodiamonds on amorphous carbon films. Using high-temperature spin control, we observe the magnetic phase transition of a single nickel nanoparticle at about 615 K. This work enables nano-thermometry and nano-magnetometry in the high-temperature regime.
arXiv comment26 pages, 3 figures + 12 supplementary figures
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- Wide-field fluorescent nanodiamond spin measurements toward real-time large-area intracellular quantum thermometry
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