Entanglement-based single-shot detection of a single magnon with a superconducting qubit

• DOI: 10.1126/science.aaz9236
• Publication Date: 2020-01-24T00:09:26Z
• Authors: Dany Lachance-Qui...; Samuel Piotr Wolski; Yutaka Tabuchi; Shingo Kono; Koji Usami; Yasunobu Nakamura
• Keywords: Magnon; Quantum sensor; Ferrimagnetism

Detecting a single magnetic excitation Quantum-enhanced sensing is one of the near-term applications for developing field quantum technologies. A promising approach to relies on entangling well-controlled system (the sensor) interest detect quanta excitations in latter. By superconducting qubit with ferrimagnetic crystal, Lachance-Quirion et al. demonstrate that they can (a magnon) within sample. The demonstration high-efficiency single-magnon detector will be useful as well an active component hybrid systems and should find wide range Science , this issue p. 425