Researchers have detected the third-order exceptional line (EL) in a nitrogen-vacancy (NV) spin system and have methodically investigated the relationships between symmetries and high-order non-Hermitian exceptional points (EPs). The study has been published in the journal Nature Nanotechnology.
E-Mail
IMAGE: a) Energy levels used to achieve SCC. b) A schematic diagram of SCC readout. c) The excitation spectrum of the nitrogen-vacancy (NV) center used here at cryogenic temperature of 8?K.. view more
Credit: ZHANG Qi et al.
The team led by Professor DU Jiangfeng and Professor WANG Ya from the Chinese Academy of Sciences (CAS) Key Laboratory of Microscale Magnetic Resonance of the University of Science and Technology of China put forward an innovative spin-to-charge conversion method to achieve high-fidelity readout of qubits, stepping closer towards fault-tolerant quantum computing.
Quantum supremacy over classical computers has been fully exhibited in some specific problems, yet the next milestone, fault-tolerant quantum computing, still requires the accumulated logic gate error and the spin readout fidelity to exceed the fault-tolerant threshold. DU s team has resolved the first requirement in the nitrogen-vacancy (NV) center system [