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Published August 24, 2010 | Published
Journal Article Open

Optically Generated 2-Dimensional Photonic Cluster State from Coupled Quantum Dots

Abstract

We propose a method to generate a two-dimensional cluster state of polarization encoded photonic qubits from two coupled quantum dot emitters. We combine the proposal for generating one-dimensional cluster state strings from a single dot, with a new proposal for an induced conditional phase gate between the two quantum dots. The entanglement between the two dots translates to entanglement between the two photonic cluster state strings. Further interpair coupling of the quantum dots using cavities and waveguides can lead to a two-dimensional cluster sheet, the importance of which stems from the fact that it is a universal resource for quantum computation. Analysis of errors indicates that our proposal is feasible with current technology. Crucially, the emitted photons need not have identical frequencies, and so there are no constraints on the resonance energies for the quantum dots.

Additional Information

© 2010 The American Physical Society. Received 31 March 2010; revised manuscript received 23 July 2010; published 24 August 2010. This work was supported in part by the Engineering and Physical Sciences Research Council and the U.S. Office of Naval Research and NSA/LPS.

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