Physics – Quantum Physics
Scientific paper
2011-06-04
Phys. Rev. A 84, 042310 (2011)
Physics
Quantum Physics
10 pages, 3 figures
Scientific paper
10.1103/PhysRevA.84.042310
Remote information concentration (RIC) in $d$-level systems (qudits) is studied. It is shown that the quantum information initially distributed in three spatially separated qudits can be remotely and deterministically concentrated to a single qudit via an entangled channel without performing any global operations. The entangled channel can be different types of genuine multipartite pure entangled states which are inequivalent under local operations and classical communication. The entangled channel can also be a mixed entangled state, even a bound entangled state which has a similar form to the Smolin state, but has different features from the Smolin state. A common feature of all these pure and mixed entangled states is found, i.e., they have $d^2$ common commuting stabilizers. The differences of qudit-RIC and qubit-RIC ($d=2$) are also analyzed.
Tang Shi-Qing
Wang Xin-Wen
Xie Li-Jun
Yang Guo-Jian
Zhang Deng-Yu
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