Cavity grid for scalable quantum computation with superconducting circuits

¹  Department of Physics, CeNS, and ASC, Ludwig-Maximilians-Universität - Theresienstrasse 37, 80333 Munich, Germany, EU
²  Walther-Meißner-Institut, Bayer. Akademie der Wissenschaften - Walther-Meißner-Str. 8, 85748 Garching, Germany, EU
³  Department of Physics, Technische Universität München - James-Franck-Str., 85748 Garching, Germany, EU
⁴  Institute for Quantum Computing, University of Waterloo - Waterloo, ON, Canada
⁵  Departamento de Química Física, Universidad del País Vasco - Euskal Herriko Unibertsitatea - 48080 Bilbao, Spain, EU

Corresponding author: Florian.Marquardt@physik.lmu.de

Received: 4 December 2008
Accepted: 16 February 2009

Abstract

We propose an architecture for quantum computing based on superconducting circuits, where on-chip planar microwave resonators are arranged in a two-dimensional grid with a qubit at each intersection. This allows any two qubits on the grid to be coupled at a swapping overhead independent of their distance. We demonstrate that this approach encompasses the fundamental elements of a scalable fault-tolerant quantum-computing architecture.