New preprint from the 202Q-lab, with great support from our theory collaborators at Chalmers. We demonstrate universal control of a bosonic mode in a superconducting circuit, using drive-activated polynomial interactions. We implement operations such as squeezing, trisqueezing, and the cubic gate, which we utilize to deterministically prepare the much sought-after cubic phase state as fast as 60 nanoseconds.
We believe that this is the best-looking cubic phase state ever prepared! (Improving on our own first realization here.) Just look at the Wigner functions – if you disagree, let us know.
Our results are a step forward towards continuous-variable quantum computing with microwave modes. Read more in our preprint here.