Non-Gaussian states for continuous variable quantum computation via Gaussian maps

Details Non-Gaussian states for continuous variable quantum computation via Gaussian maps Non-Gaussian states for continuous variable quantum computation via Gaussian maps

2006-06-05

arxiv.org/abs/quant-ph/0606026v2

Journal of Modern Optics, 54, 855 (2007)

Physics

Quantum Physics

8 pages, 6 figures

Scientific paper

10.1080/09500340601101575

We investigate non-Gaussian states of light as ancillary inputs for generating nonlinear transformations required for quantum computing with continuous variables. We consider a recent proposal for preparing a cubic phase state, find the exact form of the prepared state and perform a detailed comparison to the ideal cubic phase state. We thereby identify the main challenges to preparing an ideal cubic phase state and describe the gates implemented with the non-ideal prepared state. We also find the general form of operations that can be implemented with ancilla Fock states, together with Gaussian input states, linear optics and squeezing transformations, and homodyne detection with feed forward, and discuss the feasibility of continuous variable quantum computing using ancilla Fock states.

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