Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:quant-ph/0008078 · Physical Review Letters

Remote Information Concentration Using a Bound Entangled State

Mio Murao, Vlatko Vedral

Published Jan 8, 2001• 114 citations
arXivHTMLPDF

Abstract

Remote information concentration, the reverse process of quantum telecloning, is presented. In this scheme, quantum information originally from a single qubit, but now distributed into three spatially separated qubits, is remotely concentrated back to a single qubit via an initially shared entangled state without performing any global operations. This entangled state is a single unlockable bound entangled state and we analyze its properties.

DOI
10.1103/physrevlett.86.352

Related papers

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

Xin-Wen Wang, Shi-Qing Tang, Xie Li-Jun +2 more

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.

arXiv:1302.0626•Quantum Information and Computation•Jan 1, 2014•1 citation

REMOTE INFORMATION CONCENTRATION BY W STATE

Peng Jia-yin, Ming-Qiang Bai, Zhiwen Mo

Employing the six-particle W state as the quantum channel in this paper, we investigate remote information concentration (RIC) which is the reverse process of the 1→5 optimal asymmetric economical phase-covariant telecloning (OAEPCT). To achieve the task, Bell state measurement and unitary operation are needed. It is shown that the quantum information initially distributed in five spatially separated qubits can be remotely and probabilistically concentrated back to a single qubit without performing any global operations. The result shows a peculiar phenomenon that the RIC is not always performed perfectly. It can be achieved with certain probability.

International Journal of Modern Physics B•Sep 11, 2013•7 citations

Remote Quantum-Information Concentration: Reversal of Ancilla-Free Phase-Covariant Telecloning

Xin-Wen Wang, Shi-Qing Tang

Telecloning and its reverse process, referred to as remote quantum-information concentration (RQIC), have been attracting considerable interest because of their potential applications in quantum-information processing. The previous RQIC protocols were focused on the reverse process of the optimal universal telecloning. We here study the reverse process of ancilla-free phase-covariant telecloning (AFPCT). It is shown that the quantum information originally distributed into two spatially separated qubits from a single qubit via the optimal AFPCT procedure can be remotely concentrated back to a single qubit with a certain probability by using an asymmetric W state as the quantum channel.

Open Journal of Microphysics•Jan 1, 2013•4 citations

Controlled Remote Information Concentration bya Multiqubit Greenberger-Horne-Zeilinger Entangled State

Xie Li-Jun

A scheme for remote information concentration via a five-qubit Greenberger-Horne-Zeilinger entangled(GHZ) state is proposed.In this scheme,the GHZ state serves not only the control parameter but also the quantum channel.The receiver can successfully reconstruct the quantum information of a single qubit state,which has been distributed into three spatially separated qubits,depending on the cooperation of a controller without any global operations.This scheme can also be generalized to the case with nspatially separated controllers via an(n+4)-qubit GHZ state.

Journal of Hengyang Normal University•Jan 1, 2013•0 citations

Remote information concentration and multipartite entanglement in multilevel systems

Xin-Wen Wang, Deng-Yu Zhang, Guojian Yang +2 more

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.

arXiv:1106.0795•Physical Review A•Oct 6, 2011•22 citations

REMOTE INFORMATION CONCENTRATION VIA FOUR-PARTICLE CLUSTER STATE AND BY POSITIVE OPERATOR-VALUE MEASUREMENT

Peng Jia-yin, MING-XING LUO, Zhiwen Mo

By using a proper positive operator-valued measure (POVM), we present two new schemes for remote information concentration via four-particle cluster state. It is demonstrated that by employing a maximally entangled (respectively, nonmaximally entangled) four-particle cluster state as the quantum channel, quantum information initially and generally (respectively, specially) distributed in three spatially separated qubits can be remotely and probabilistically concentrated back to a single qubit without performing any global operations. Moreover, the total success probabilities of these two protocols are also worked out. It is more easier to realize experimentally by POVM than by projective measurement.

International Journal of Modern Physics B•Jun 20, 2013•13 citations
Remote information concentration, the reverse process of quantum telecloning, is presented. In this scheme, quantum information originally from a single qubit, but now distributed into three spatially separated qubits, is remotely concentrated back to a single qubit via an initially shared entangled state without performing any global operations. This entangled state is a single unlockable bound entangled state and we analyze its properties.
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 ddd-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.
Employing the six-particle W state as the quantum channel in this paper, we investigate remote information concentration (RIC) which is the reverse process of the 1→5 optimal asymmetric economical phase-covariant telecloning (OAEPCT). To achieve the task, Bell state measurement and unitary operation are needed. It is shown that the quantum information initially distributed in five spatially separated qubits can be remotely and probabilistically concentrated back to a single qubit without performing any global operations. The result shows a peculiar phenomenon that the RIC is not always performed perfectly. It can be achieved with certain probability.
Telecloning and its reverse process, referred to as remote quantum-information concentration (RQIC), have been attracting considerable interest because of their potential applications in quantum-information processing. The previous RQIC protocols were focused on the reverse process of the optimal universal telecloning. We here study the reverse process of ancilla-free phase-covariant telecloning (AFPCT). It is shown that the quantum information originally distributed into two spatially separated qubits from a single qubit via the optimal AFPCT procedure can be remotely concentrated back to a single qubit with a certain probability by using an asymmetric W state as the quantum channel.
A scheme for remote information concentration via a five-qubit Greenberger-Horne-Zeilinger entangled(GHZ) state is proposed.In this scheme,the GHZ state serves not only the control parameter but also the quantum channel.The receiver can successfully reconstruct the quantum information of a single qubit state,which has been distributed into three spatially separated qubits,depending on the cooperation of a controller without any global operations.This scheme can also be generalized to the case with nspatially separated controllers via an(n+4)-qubit GHZ state.
Remote information concentration (RIC) in ddd-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 d2{d}^{2}d2 common commuting stabilizers. The differences of qudit-RIC and qubit-RIC (d=2d=2d=2) are also analyzed.
By using a proper positive operator-valued measure (POVM), we present two new schemes for remote information concentration via four-particle cluster state. It is demonstrated that by employing a maximally entangled (respectively, nonmaximally entangled) four-particle cluster state as the quantum channel, quantum information initially and generally (respectively, specially) distributed in three spatially separated qubits can be remotely and probabilistically concentrated back to a single qubit without performing any global operations. Moreover, the total success probabilities of these two protocols are also worked out. It is more easier to realize experimentally by POVM than by projective measurement.