State estimation from pair of conjugate qudits

Abstract

We show that, for $N$ parallel input states, an anti-linear map with respect to a specific basis is essentially a classical operator. We also consider the information contained in phase-conjugate pairs $|\varphi >|{\varphi }^{\ast }>$, and prove that there is more information about a quantum state encoded in phase-conjugate pairs than in parallel pairs.

4 pages, 1 table

References in corpus (2)

• Optimal measurements for relative quantum information
• Optimal probabilistic estimation of quantum states