Remote-controlled quantum computing by quantum entanglement

Wang, Dongyang; Liu, Yong; Ding, Jiangfang; Qiang, Xiaogang; Liu, Yingwen; Huang, Anqi; Fu, Xiang; Xu, Ping; Deng, Mingtang; Yang, Xuejun; Wu, Junjie

doi:10.1364/ol.401921

“…The control of entanglement for a quantum system has attracted the interest of many physicists for its importance in the processing of quantum information, as it is the foundation of quantum computation and communication (Gyongyosi and Imre 2019;Ji and Juju 2019;Wang et al 2020). Additionally, many theoretical and experimental schemes have been proposed for enhancing the entanglement and quantum correlation (Metwally 2017;Xuexiang et al 2018;Min et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Enhancing the information of nonlinear SU(1, 1) quantum systems interacting with a two-level atom

Abd‐Rabbou

¹

,

Ali

²

,

Ahmed

³

2022

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The effect of nonlinearity, initial atomic state, and different resonance cases on the interaction between nonlinear SU (1, 1) quantum states and a two-level atom is discussed. The optimal behaviours of decoherence, entanglement and quantum coherence are predicted via using the skew information, tomographic entropy, and the relative entropy of coherence, respectively. It is shown that the detuning parameter has a destructive effect on the coherence and consequently on the entanglement if the quantum system is regulated in the ideal SU (1, 1) quantum systems. For the nonlinear SU (1, 1) quantum systems, the ability to suppress the decay of entanglement induced by the detuning may be increased by preparing the initial atomic state in its excited state.

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“…Both distributed quantum computation and delegated quantum computation have been investigated broadly; see references [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ] and [ 6 , 11 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ], respectively. Typically, the distributed architecture for quantum computation makes use of photons as flying qubits between computational nodes, where each node is equipped with a quantum computer.…”

Section: Introductionmentioning

confidence: 99%

A Distributed Architecture for Secure Delegated Quantum Computation

Ma

¹

,

Zhu

²

,

Quan

³

et al. 2022

Entropy

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In this paper, we propose a distributed secure delegated quantum computation protocol, by which an almost classical client can delegate a (dk)-qubit quantum circuit to d quantum servers, where each server is equipped with a 2k-qubit register that is used to process only k qubits of the delegated quantum circuit. None of servers can learn any information about the input and output of the computation. The only requirement for the client is that he or she has ability to prepare four possible qubits in the state of (|0⟩+eiθ|1⟩)/2, where θ∈{0,π/2,π,3π/2}. The only requirement for servers is that each pair of them share some entangled states (|0⟩|+⟩+|1⟩|−⟩)/2 as ancillary qubits. Instead of assuming that all servers are interconnected directly by quantum channels, we introduce a third party in our protocol that is designed to distribute the entangled states between those servers. This would simplify the quantum network because the servers do not need to share a quantum channel. In the end, we show that our protocol can guarantee unconditional security of the computation under the situation where all servers, including the third party, are honest-but-curious and allowed to cooperate with each other.

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“…The control of entanglement for a quantum system has attracted the interest of many physicists for its importance in the processing of quantum information, as it is the foundation of quantum computation and communication [1][2][3]. Additionally, many theoretical and experimental schemes have been proposed for enhancing the entanglement and quantum correlation [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the information of nonlinear SU(1, 1) quantum systems interacting with a two-level atom

Abd‐Rabbou

¹

,

Ali

²

,

Ahmed

³

2022

Preprint

0

View full text Add to dashboard Cite

The effect of nonlinearity, initial atomic state, and different resonance cases on the interaction between nonlinear SU (1, 1) quantum states and a two-level atom is discussed. The optimal behaviours of decoherence, entanglement and quantum coherence are predicted via using the skew information, tomographic entropy, and the relative entropy of coherence, respectively. It is shown that the detuning parameter has a destructive effect on the coherence and consequently on the entanglement if the quantum system is regulated in the ideal SU (1, 1) quantum systems. For the nonlinear SU (1, 1) quantum systems, the ability to suppress the decay of entanglement induced by the detuning may be increased by preparing the initial atomic state in its excited state.

show abstract

Remote-controlled quantum computing by quantum entanglement

Cited by 8 publications

References 44 publications

Enhancing the information of nonlinear SU(1, 1) quantum systems interacting with a two-level atom

Enhancing the information of nonlinear SU(1, 1) quantum systems interacting with a two-level atom

A Distributed Architecture for Secure Delegated Quantum Computation

Enhancing the information of nonlinear SU(1, 1) quantum systems interacting with a two-level atom

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