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

Author:

Lachance-Quirion Dany1ORCID,Wolski Samuel Piotr1ORCID,Tabuchi Yutaka1ORCID,Kono Shingo1ORCID,Usami Koji1,Nakamura Yasunobu12ORCID

Affiliation:

1. Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro, Tokyo 153-8904, Japan.

2. Center for Emergent Matter Science (CEMS), RIKEN, Wako, Saitama 351-0198, Japan.

Abstract

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

Funder

Japan Society for the Promotion of Science

Ministry of Education, Culture, Sports, Science, and Technology

Japan Science and Technology Agency

Fonds Québécois de la Recherche sur la Nature et les Technologies

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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