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25 April 2024 |
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Entanglement-based single-shot detection of a single magnon with a superconducting qubit | | Dany Lachance-Quirion
; Samuel Piotr Wolski
; Yutaka Tabuchi
; Shingo Kono
; Koji Usami
; Yasunobu Nakamura
; | | Date: |
21 Oct 2019 | | Abstract: | The recent development of hybrid systems based on superconducting circuits
has opened up the possibility of engineering sensors of quanta of different
degrees of freedom. Quantum magnonics, which aims to control and read out
quanta of collective spin excitations in magnetically-ordered systems,
furthermore provides unique 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 ferromagnetic 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. | | Source: | arXiv, 1910.9096 | | Services: | Forum | Review | PDF | Favorites | |
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