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Entanglement-based single-shot detection of a single magnon with a superconducting qubit
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Entanglement-based single-shot detection of a single magnon with a superconducting qubit
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Journal Article
Entanglement-based single-shot detection of a single magnon with a superconducting qubit
2020
Overview
The recent development of hybrid systems based on superconducting circuits provides the possibility of engineering quantum sensors that exploit different degrees of freedom. Quantum magnonics, which aims to control and read out quanta of collective spin excitations in magnetically ordered systems, provides opportunities for advances in both the study of magnetism and the development of quantum technologies. Using a superconducting qubit as a quantum sensor, we report the detection of a single magnon in a millimeter-sized ferrimagnetic crystal with a quantum efficiency of up to 0.71. The detection is based on the entanglement between a magnetostatic mode and the qubit, followed by a single-shot measurement of the qubit state. This proof-of-principle experiment establishes the single-photon detector counterpart for magnonics.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
