Measurement-based quantum computing with a spin ensemble coupled to a stripline cavity

Details Measurement-based quantum computing with a spin ensemble coupled to a stripline cavity Measurement-based quantum computing with a spin ensemble coupled to a stripline cavity

2011-08-08

arxiv.org/abs/1108.1590v2

New J. Phys. 14, 013030 (2012)

Physics

Quantum Physics

17 pages, 8 figures

Scientific paper

10.1088/1367-2630/14/1/013030

Recently a new form of quantum memory has been proposed. The storage medium is an ensemble of electron spins, coupled to a stripline cavity and an ancillary readout system. Theoretical studies suggest that the system should be capable of storing numerous qubits within the ensemble, and an experimental proof-of-concept has already been performed. Here we show that this minimal architecture is not limited to storage but is in fact capable of full quantum processing by employing measurement-based entanglement. The technique appears to be remarkably robust against the anticipated dominant error types. The key enabling component, namely a readout technology that non-destructively determines "are there n photons in the cavity?", has already been realised experimentally.

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