Decoherence effects on quantum Fisher information of multi-qubit W states

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Homayoun t.; Aghayar k.

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Journal: Iranian Journal of Physics Research Year:2019 | Volume:19 | Issue:3 Page(s): 515-520

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Title

Decoherence effects on quantum Fisher information of multi-qubit W states

Author(s)

Homayoun t. | Aghayar k. | Issue Writer Certificate

Keywords

quantum Fisher informationQ1

entanglementQ1

W stateQ1

decoherrenceQ1

Abstract

quantum Fisher information of a parameter characterizing the sensitivity of a state with respect to parameter changes. In this paper, we study the quantum Fisher information of the W state for four, five, six and seven particles in decoherence channels, such as amplitude damping, phase damping and depolarizing channel. Using Krauss operators for decoherence channels components, we investigate the quantum Fisher information quite analytically. We observe that for the W state, the amount of the quantum Fisher information and consequently, the amount of entanglement are reduced by applying the quantum noises, which affect each particle in the same way. In some cases, a relative increase appears in the quantum Fisher information for certain values of the decay strength p. We also show that the phase damping channel vanishes the value of the quantum Fisher information for the W state.

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APA: Copy

Homayoun, t., & Aghayar, k.. (2019). Decoherence effects on quantum Fisher information of multi-qubit W states. IRANIAN JOURNAL OF PHYSICS RESEARCH, 19(3 ), 515-520. SID. https://sid.ir/paper/1370/en

Vancouver: Copy

Homayoun t., Aghayar k.. Decoherence effects on quantum Fisher information of multi-qubit W states. IRANIAN JOURNAL OF PHYSICS RESEARCH[Internet]. 2019;19(3 ):515-520. Available from: https://sid.ir/paper/1370/en

IEEE: Copy

t. Homayoun, and k. Aghayar, “Decoherence effects on quantum Fisher information of multi-qubit W states,” IRANIAN JOURNAL OF PHYSICS RESEARCH, vol. 19, no. 3 , pp. 515–520, 2019, [Online]. Available: https://sid.ir/paper/1370/en

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