Development of superconducting quantum circuit technology manifests our ability to control and measure quantum states of the collective excitation modes in a circuit. The approach can be extended to many other collective modes found in solid-state physics, allowing us to access single quanta of those excitations, especially by using superconducting qubits as a tool. We discuss the examples in quantum magnonics [1-3] and quantum acoustics [4-6].
[1] Y. Tabuchi et al., Science 349, 405 (2015).
[2] D. Lachance-Quirion et al., Sci. Adv. 3, e1603150 (2017).
[3] D. Lachance-Quirion et al., Appl. Phys. Express 12, 070101 (2019).
[4] A. Noguchi et al., New J. Phys. 18, 103036 (2016).
[5] A. Noguchi et al., Phys. Rev. Lett. 119, 180505 (2017).
[6] A. Noguchi et al., arXiv:1808.03372.