Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-06-25
EPL 85 No 5 (March 2009) 50007 (5pp)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
version as published in EPL 95 No 5 (March 2009) 50007, 5 pages
Scientific paper
10.1209/0295-5075/85/50007
Superconducting circuits are among the leading contenders for quantum information processing. This promising avenue has been strengthened with the advent of circuit quantum electrodynamics, underlined by recent experiments coupling on-chip microwave resonators to superconducting qubits. However, moving towards more qubits will require suitable novel architectures. Here, we propose a scalable setup for quantum computing where such resonators are arranged in a two-dimensional grid with a qubit at each intersection. Its versatility allows any two qubits on the grid to be coupled at a swapping overhead independent of their distance and yields an optimal balance between reducing qubit transition frequency spread and spurious cavity-induced couplings. These features make this setup unique and distinct from existing proposals in ion traps, optical lattices, or semiconductor spins. We demonstrate that this approach encompasses the fundamental elements of a scalable fault-tolerant quantum computing architecture.
Delft Jan von
Fowler Austin G.
Helmer Ferdinand
Mariantoni Matteo
Marquardt Florian
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