Parametric cQED: A new framework for quantum systems engineering

High-fidelity quantum state preparation, manipulation, and measurement are the three cornerstones of any quantum information processing platform. In this talk I will describe a new paradigm of parametric circuit-QED (or pQED), which tackles all three challenges in a unified framework employing coherent and dissipative parametric interactions. I will first discuss new protocols for exact quantum state stabilization in resonant regime of pQED that break the error-time tradeoff limiting the usual autonomous schemes [1,2], and how they can be extended for scalable multipartite entanglement generation [3]. Next, I will discuss the dispersive regime of pQED that enables applications such as high-fidelity, tunable readout and fast conditional interactions [4,5]. Finally, I will comment on some new opportunities for exploring fundamental physics of open systems afforded by such platforms [6].