Hierarchical quantum-information splitting

Wang, Xinwen; Xia, Lifang; Wang, Zhiyong; Zhang, Deng-Yu

doi:10.1016/j.optcom.2009.11.015

Cited by 84 publications

(37 citation statements)

References 45 publications

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“…Entanglement is one of the most fascinating features of quantum mechanics and plays a central role in quantum information processing [1][2][3][4]. Much progress concerning quantum entanglement in both theory and experiment has been achieved.…”

Section: Introductionmentioning

confidence: 99%

Quantum Discord for a Central Two-Qubit System Coupled to an XY Spin Chain with Energy Current

Zhong

2013

Int J Theor Phys

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We investigate the quantum discord dynamics of a two-qubit system coupled to an XY spin-chain environment with energy current. We compared dynamical behaviors of quantum discord under different system-environment couplings, the size of the degrees of freedom of the environment, the anisotropy parameter, and the energy current. The results indicate that the energy current can strongly suppress the quantum discord in the weakcoupling region, while it has no obvious effect on the quantum discord in the strong-coupling regime.

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Section: Introductionmentioning

confidence: 99%

Quantum Discord for a Central Two-Qubit System Coupled to an XY Spin Chain with Energy Current

Zhong

2013

Int J Theor Phys

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“…The second, by Shi, et al, details a one-insider (one of those receiving a part of the secret) attack that will break a specific QSS protocol. The third by Xu et al, addresses aspects of hierarchical quantum information splitting, a protocol in which the quantum information is broken up in such a way that some subset of agents have greater access to the secret than other agents [6]. The developed protocol is for an arbitrary two-qubit state, and allows for multiple agents such that the "high grade" agents need only each other and one "low grade" agent to reconstruct the secret while the low grade agents need cooperation from everyone.…”

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confidence: 99%

Introduction to Special Issue on quantum cryptography

Gilbert

Weinstein

2014

Quantum Inf Process

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“…In Ref. [29], two of us introduced the concept of hierarchical QIS, in which the agents have different powers to recover the sender's secret, i.e., their authorities for getting the secret are hierarchized. Ref.…”

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“…Ref. [29] explicitly demonstrated a scheme for hierarchical QIS involving two grades with the upper grade containing one agent and the lower grade containing two agents. The scheme will be referred to as (1, 2)-hierarchy model of quantum information splitting.…”

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Hierarchical Quantum Information Splitting with Six-Photon Cluster States

et al. 2010

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We propose a scheme for hierarchical quantum information splitting with the recently realized six-photon cluster state (Lu et al. in Nat. Phys. 3:91, 2007), where a Boss distributes a quantum secret (quantum state) to five distant agents who are divided into two grades. Two agents are in the upper grade and three agents are in the lower grade. An agent of the upper grade only needs the collaboration of two of the other four agents for getting the secret, while an agent of the lower grade needs the collaboration of all the other four agents. In other words, the agents of two grades have different authorities to recover Boss's secret.Keywords Quantum secret · Hierarchical splitting · Photonic qubit · Cluster statesThe rapidly growing field of quantum information science is the fruit of the combination of information theory and quantum mechanics. Quantum information processing mainly involves the manipulation and transmission of information with the principle of quantum mechanics. The unique and useful properties of quantum mechanics is the inner reason for that why quantum information theory can implement many information processing tasks that classical information theory cannot achieve. In quantum information science, information is encoded in quantum states, and the information processing is in fact the manipulation and transfer of quantum states. Entanglement, the most intriguing property of quantum mechanics, is the center resource of quantum information science, and plays a powerful role in the transfer of quantum states. One well-known example is the quantum teleportation [1, 2] which utilizes the bipartite or multipartite entangled states to transport an unknown quantum state from one site to another one. However, not all entangled states can be used to implement perfect teleportation, and that whether or not an entangled state can implement teleportation is determined by its entanglement properties [3]. Thus teleportation can also reveal some properties of entangled states, especially multipartite entangled states [4,5]. On the

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Hierarchical quantum-information splitting

Cited by 84 publications

References 45 publications

Quantum Discord for a Central Two-Qubit System Coupled to an XY Spin Chain with Energy Current

Quantum Discord for a Central Two-Qubit System Coupled to an XY Spin Chain with Energy Current

Introduction to Special Issue on quantum cryptography

Hierarchical Quantum Information Splitting with Six-Photon Cluster States

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