Rydberg interactions are now in use in many research groups for quantum informatio processing. I will present experiments showing the creation of entangled |W> states of ~10 atoms, and two-atom Bell states. While these experiments form a basis for future developments, scalable quantum computing will require improvement of many aspects of these experiments. I will address recent ideas and progress in several directions including doubly magic trapping for long coherence qubits,higher gate fidelity with shaped analytic pulses, and measurement free error correction, which leverages the potential of Rydberg interactions for efficient multi-qubit gates. Rydberg interactions can also couple disparate quantum systems, and we will present progress towards a single atom - superconducting qubit interface.
1. PRL 117, 150801 (2016)
2. PRA 94, 032306 (2016)
3. PRL 117, 130503 (2016
Mark Saffman is an experimental physicist working in the areas of atomic physics, quantum and nonlinear optics, and quantum information processing. He has made significant contributions to optical solitons, pattern formation, sources of entangled light, and quantum computing. His current research effort is devoted to the development of neutral atom based quantum computing devices. His research team was the first to demonstrate a quantum CNOT gate between two trapped neutral atoms, and the deterministic entanglement of a pair of neutral atoms. This was done using dipole mediated interactions between highly excited Rydberg atoms. He is currently developing scalable neutral atom platforms using arrays of trapped atoms.
He is a Professor of Physics at the University of Wisconsin-Madison, and a fellow of the American Physical Society and the Optical Society of America. He has been recognized with the Alfred P. Sloan Fellowship and a University of Wisconsin Vilas Associate Award. He also serves as an Associate Editor for Physical Review A.