Progress Towards Fast Dissipation-Induced Entanglement In Circuit-QED Using Parametric Interactions

Parametric interactions enable powerful and novel functionalities with applications in many areas of quantum information science and engineering. Dissipative state stabilization, which seeks to achieve quantum state preparation without the standard gate-based methods, is an application that benefits from parametric interactions. Unlike resonantly-driven protocols, parametric schemes for state preparation circumvent the tradeoff between target state fidelity and state preparation time [1]. In this talk, I will discuss progress toward experimental realization of a parametrically-induced state stabilization scheme in circuit-QED architecture. Our device consists of two transmon qubits coupled to a common resonator with a flux-tunable SQUID coupler. Modulating the loop flux at multiple frequencies allows simultaneous Hamiltonian and dissipation engineering, with coupling strengths on the order of tens of MHz. The modular design paves the way towards natural extensions of such schemes to multipartite entanglement stabilization. [1] E. Doucet, F. Reiter, L. Ranzani, A. Kamal. arXiv:1810.03631 (2019).