Joint Quantum Seminar Wednesday, November 7, 2018 4:00 PM, Jefferson 250 Prof. Rob Schoelkopf, Yale University “The Prospects for Scalable Quantum Computing with Superconducting Circuits”” Dramatic progress has been made in the last decade and a half towards realizing solid-state systems for quantum information processing with superconducting quantum circuits. Artificial atoms (or qubits) based on Josephson junctions have improved their coherence times more than a million-fold, have been entangled, and used to perform simple quantum algorithms. The next challenge for the field is demonstrating quantum error correction that actually improves the lifetimes, a necessary step for building more complex systems. At Yale we have been pursuing a hardware-efficient approach for error correction, that relies on encoding information in a superconducting cavity, the so-called “cat codes.” With this approach, we have applied real-time measurements and feedback to achieve the first extension of the lifetime of a quantum bit through error correction. For scaling, an attractive approach is the modular architecture, in which small quantum processors are networked together using microwave signals on superconducting transmission lines. I will present the first implementation of a teleported C-NOT gate, which is a key building block for the modular approach. Student Presentation (Mian Zhang) at 4:00 Guest Presentation at 4:30 Refreshments will be provided Samantha Dakoulas Faculty Assistant to Professors Lukin & Greiner & their groups Department of Physics 17 Oxford St., Lyman 324A Cambridge, MA 02138 P. (617) 496-2544