I'm not really sure what they're trying to accomplish here, but I never thought I'd read a quantum physics-related paper with the sentences:
"We place a tardigrade tun on a superconducting transmon qubit and observe coupling between the qubit and the tardigrade tun via a shift in the resonance frequency of the new qubit-tardigrade system. This joint qubit-tardigrade system is then entangled with a second superconducting qubit."