Metrological non-classical correlations and quantum coherence in hybrid (1/2,1) system under decoherence channels

IF 1.2 4区 物理与天体物理 Q4 OPTICS
Abdessamie Chhieb, Mansoura Oumennana, Zakaria Bouafia, Aicha Chouiba, Mostafa Mansour, Mohamed Ouchrif
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Abstract

Our research focuses on the interplay between thermal noise and decoherence channels on quantum coherence and nonclassical correlations in a hybrid (1/2,1) Heisenberg model. This hybrid system integrates the Dzyaloshinsky–Moriya interaction (DMI) and operates under the influence of an external magnetic field. We use local quantum Fisher information (LQFI) for correlation estimation and relative entropy of coherence for coherence measurement in the considered system. Our investigation encompasses various parameters of the hybrid system, the strength of the DMI and the intensity of the external magnetic field. Our findings underscore that elevated temperature compromises both nonclassical correlations and coherence. On the other hand, the robustness of the DMI mitigates the impact of thermal noise on quantum Fisher information correlations and relative entropy of coherence in the hybrid system. Additionally, we inspect the impact of decohering channels-specifically, dephasing, phase flip, and bit- and trit-flip channels-on thermal coherence and quantum correlations. The introduction of various decoherence processes into the hybrid qubit-qutrit system leads to a competition with thermal fluctuations, thereby giving rise to out-of-equilibrium states. Our results indicate that as the decoherence strength parameter (p) increases, both LQFI and relative entropy of coherence exhibit similar behaviors in the dephasing and phase flip channels. These resources gradually diminish, eventually disappearing entirely at p = 1. In the context of the bit- and trit-flip channels, quantum coherence displays notable distinctions compared to what is observed under dephasing and phase flip channels, revealing that coherence can be preserved if the DMI is strong and the intensity of the external magnetic field is reduced. These findings are important since it is crucial to first understand the decoherence process, arising from the interaction with the environment, and then to find ways to hinder this decoherence in order to avoid the complete loss of the quantum resources necessary to quantum information processing.
退相干通道下混合(1/2,1)系统中的计量非经典相关性和量子相干性
我们的研究重点是混合(1/2,1)海森堡模型中热噪声和退相干通道对量子相干性和非经典相关性的相互作用。这个混合系统集成了 Dzyaloshinsky-Moriya 相互作用(DMI),并在外部磁场的影响下运行。我们利用局部量子费雪信息(LQFI)进行相关性估计,并利用相干的相对熵对所考虑的系统进行相干性测量。我们的研究涵盖了混合系统的各种参数、DMI 的强度和外部磁场的强度。我们的研究结果表明,温度升高会影响非经典相关性和相干性。另一方面,DMI 的稳健性减轻了热噪声对混合系统中量子费雪信息相关性和相干性相对熵的影响。此外,我们还研究了退相干信道(具体来说是去相干、相位翻转、位翻转和三翻转信道)对热相干性和量子相关性的影响。将各种退相干过程引入混合比特-量子系统会导致与热波动的竞争,从而产生失衡态。我们的研究结果表明,随着退相干强度参数(p)的增加,相干的 LQFI 和相对熵在去相位和相位翻转通道中表现出相似的行为。这些资源逐渐减少,最终在 p = 1 时完全消失。在比特和三翻转信道中,量子相干性与在去相位和相位翻转信道中观察到的量子相干性相比有明显的不同,这揭示了如果 DMI 很强,外部磁场强度减小,相干性可以保持。这些发现非常重要,因为首先必须了解与环境相互作用产生的退相干过程,然后找到阻碍退相干的方法,以避免量子信息处理所需的量子资源完全丧失。
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来源期刊
Laser Physics
Laser Physics 物理-光学
CiteScore
2.60
自引率
8.30%
发文量
127
审稿时长
2.2 months
期刊介绍: Laser Physics offers a comprehensive view of theoretical and experimental laser research and applications. Articles cover every aspect of modern laser physics and quantum electronics, emphasizing physical effects in various media (solid, gaseous, liquid) leading to the generation of laser radiation; peculiarities of propagation of laser radiation; problems involving impact of laser radiation on various substances and the emerging physical effects, including coherent ones; the applied use of lasers and laser spectroscopy; the processing and storage of information; and more. The full list of subject areas covered is as follows: -physics of lasers- fibre optics and fibre lasers- quantum optics and quantum information science- ultrafast optics and strong-field physics- nonlinear optics- physics of cold trapped atoms- laser methods in chemistry, biology, medicine and ecology- laser spectroscopy- novel laser materials and lasers- optics of nanomaterials- interaction of laser radiation with matter- laser interaction with solids- photonics
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