All inseparable two-mode Gaussian continuous variable states are distillable
Geza Giedke, Lu-Ming Duan, J. Ignacio Cirac, Peter Zoller
Abstract
We show that all entangled Gaussian states of two infinite dimensional systems can be distilled to maximally entangled states in finite dimensions. The distillation protocol involves local squeezing operations, local homodyne measurements with ancilla systems prepared in coherent states as well as local joint measurements of the total number operator of two copies of the state.
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