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The Prospects for Scalable Quantum Computing with Superconducting Circuits

February 6, 2018 - 4:00pm
Rob Schoelkopf
Yale University

CNAM Carr Lecture

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 bosonic oscillator, 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 into a larger whole. I will present a realization of a gate between logical qubits. This is the first implementation of a teleported C-NOT gate, which is a key building block for the modular approach.

Hosted by Chris Lobb and Fred Wellstood

*Light refreshments at 3:30 pm*

1412 John S Toll Physics Building
College Park, MD 20742