Journal
PHYSICAL REVIEW A
Volume 75, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.75.022326
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We give an explicit procedure based on entangled input states for estimating a SU(d) operation U with rate of convergence 1/N-2 when sending N particles through the device. We prove that this rate is optimal. We also evaluate the constant C such that the asymptotic risk is C/N-2. However, other strategies might yield a better constant C.
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