Many-to-one remote information concentration for qudits and multipartite entanglement

TL;DR

This paper introduces a general scheme for remote information concentration in qudits, enabling the deterministic transfer of quantum information from multiple parties to a single qudit using various entangled states, including bound entangled states.

Contribution

It presents a novel, versatile protocol for many-to-one RIC in d-level systems, expanding the types of entangled channels and including mixed and bound entangled states.

Findings

RIC can be performed with different entangled states, including mixed and bound entangled states.

The protocol is applicable to both qudits and qubits, with potential for many-to-many RIC.

The entangled channels used can be tailored for specific quantum information tasks.

Abstract

Telecloning and its reverse process, referred to as remote information concentration(RIC), have attracted considerable interest because of their potential applications in quantum-information processing. We here present a general scheme for RIC in d-level systems (qudits), in which the quantum information initially distributed in many spatially separated qudits can be remotely and deterministically concentrated to a single qudit via an entangled channel without performing any global operations. We show that the entangled channel of RIC can be different types of entangled states, including mixed states as well as pure ones. More interestingly, these mixed states include a bound entangled state which has a similar form to the generalized Smolin state but has different characteristics from it. We also show that there exists a multipartite entangled state which can be used to implement both telecloning and RIC in the two-level system. Our many-to-one RIC protocol could be slightly modified to perform some types of many-to-many RIC tasks.