Fisher information of accelerated two-qubit system in the presence of\n the color and white noise channels

2019/06/30 by F. Ebrahim, N. Metwally, Ebrahim, F. +1
Computer Science · Physics and Astronomy · #FOS: Physical sciences #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.1907.00442

openalex publication_date 2019/06/30 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28

Abstract

In this manuscript, we investigate the effect of the white and color noise on\na accelerated two-qubit system, where different initial state setting are\nconsidered. The behavior of the survival amount of entanglement is quantified\nfor this accelerated system by means of the concurrence. We show that, the\ncolor noise enhances the generated entanglement between the two particles even\nfor small values of the initial purity of the accelerated state. However, the\nlarger values of the white noise strength improve the generated entanglement.\nThe initial parameters that describe this system are estimated by using Fisher\ninformation, where two forms are considered, namely by using a single and\ntwo-qubit forms. It is shown that, by using the two-qubit form, the estimation\ndegree of these parameters is larger than that displayed by using a\nsingle-qubit form.\n

Citations

• Entanglement of Formation of an Arbitrary State of Two Qubits
• Finite-Time Disentanglement Via Spontaneous Emission
• Entanglement of a Pair of Quantum Bits
• Sudden Death of Entanglement

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