Time-optimal gates for quantum computing with Rydberg atoms

          @misc{ pirsa_PIRSA:22070015,
            doi = {10.48660/22070015},
            url = {https://pirsa.org/22070015},
            author = {Pupillo, Guido},
            keywords = {Quantum Information},
            language = {en},
            title = {Time-optimal gates for quantum computing with Rydberg atoms},
            publisher = {Perimeter Institute},
            year = {2022},
            month = {jul},
            note = {PIRSA:22070015 see, \url{https://pirsa.org}}
          }
          

Abstract

"Neutral atoms have emerged as a competitive platform for digital quantum simulations and computing. In this talk, we discuss recent results on the design of time-optimal two- and three-qubit gates for neutral atoms, where entangling gates are implemented via the strong and long-range interactions provided by highly excited Rydberg states. We combine numerical and semi-analytical quantum optimal control techniques to obtain theoretically laser pulses that are “smooth”, time-optimal and “global” -- that is, they do not require individual addressability of the atoms. This technique improves upon current implementations of the controlled-Z (CZ) and the three-qubit C2Z gates with just a limited set of variational parameters, demonstrating the potential of quantum optimal control techniques for advancing quantum computing with Rydberg atoms."