Effect of noise on deterministic joint remote preparation of an arbitrary two-qubit state |
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Authors: | Ming-Ming Wang Zhi-Guo Qu Wei Wang Jin-Guang Chen |
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Affiliation: | 1.School of Computer Science,Xi’an Polytechnic University,Xi’an,China;2.Jiangsu Engineering Center of Network Monitoring,Nanjing University of Information Science and Technology,Nanjing,China |
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Abstract: | Quantum communication has attracted much attention in recent years. Deterministic joint remote state preparation (DJRSP) is an important branch of quantum secure communication which could securely transmit a quantum state with 100% success probability. In this paper, we study DJRSP of an arbitrary two-qubit state in noisy environment. Taking a GHZ based DJRSP scheme of a two-qubit state as an example, we study how the scheme is influenced by all types of noise usually encountered in real-world implementations of quantum communication protocols, i.e., the bit-flip, phase-flip (phase-damping), depolarizing, and amplitude-damping noise. We demonstrate that there are four different output states in the amplitude-damping noise, while there is the same output state in each of the other three types of noise. The state-independent average fidelity is presented to measure the effect of noise, and it is shown that the depolarizing noise has the worst effect on the DJRSP scheme, while the amplitude-damping noise or the phase-flip has the slightest effect depending on the noise rate. Our results are also suitable for JRSP and RSP. |
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