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Abstract: We consider the possibility of performing linear optical quantum computationmaking use of extra photonic degrees of freedom. In particular we focus on thecase where we use photons as quadbits. The basic 2-quadbit cluster state is ahyper-entangled state across polarization and two spatial mode degrees offreedom. We examine the non-deterministic methods whereby such states can becreated from single photons and-or Bell pairs, and then give some mechanismsfor performing higher-dimensional fusion gates.



Autor: Jaewoo Joo, Peter L. Knight, Jeremy L. O'Brien, Terry Rudolph

Fuente: https://arxiv.org/



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