Dynamics of multipartite entanglement in the non-Markovian environments

Zhang, Ying-Jie; Man, Zhong‐Xiao; Zou, Xu‐Bo; Xia, Yun‐Jie; Guo, Guang‐Can

doi:10.1088/0953-4075/43/4/045502

Cited by 20 publications

(22 citation statements)

References 26 publications

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“…Finally, the PL n is found to be the most harmful to the dynamics of the purity, coherence and information, with saturation levels reaching earlier, especially for large g values. The single qutrit system's quantitative degradation is partial, which contradicts most of the earlier results, for example, those given in [19,26,33,34,43]. Most significantly, we found the decay rate to be greatly regulated by altering the values of g, which directly increases as this parameter is increased.…”

Section: Classical Field With Pl Ncontrasting

confidence: 99%

“…There was no evidence of ESD or ESB, and both noisy parameters showed a monotonic reduction. As a result, there is no way for information from the environment to flow back into the system, contradicting the findings of [19,24,28,42,43]. Because of this noise, purity, coherence and information are permanently lost rather than experiencing periodic transitory deterioration.…”

Section: Classical Field With Pl Nmentioning

confidence: 94%

“…The classical realm of the environment is preferred in this case because it allows for a more thorough analysis of the dynamics of quantum systems with a large number of degrees of freedom. Coherence dynamics for decreasing the degrading effects have been investigated under various noisy conditions for a range of quantum systems, both theoretically and experimentally [14][15][16][17][18][19][20]. We present a comprehensive investigation of the coherence preservation for a three-level system under various Gaussian noises in this respect.…”

Section: Introductionmentioning

confidence: 99%

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Decoherence Effects in a Three-Level System under Gaussian Process

Zangi,

Rahman,

et al. 2021

Preprint

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We investigate the information and coherence protection in a three-level quantum system when subjected to a classical fluctuating field described by a Gaussian process. This random field is further investigated in both noiseless and noisy regimes. The noisy regimes include fractional Gaussian, Gaussian, Ornstein Uhlenbeck, and power-law noise. We find that the Ornstein Uhlenbeck noise has a reduced destructive nature toward coherence and information initially encoded in the three-level system. Based on our findings, the proper fixing of the noisy parameters to certain provided values can contribute to optimal extended coherence and information survival. In the single qutrit system, because of all Gaussian noises, monotonic decay with no revivals has been observed. Using purity and von-Neumann entropy, we discovered that a single qutrit system outperforms systems with multiple qubits or qutrits in terms of coherence and information preservation. The fluctuating nature of the local random fields is completely lost, as evidenced by a comparison of noisy and noiseless situations. We found this entirely dependent upon the Gaussian and Markovian properties of the included noises.

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Section: Classical Field With Pl Ncontrasting

confidence: 99%

Section: Classical Field With Pl Nmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Decoherence Effects in a Three-Level System under Gaussian Process

Zangi,

Rahman,

et al. 2021

Preprint

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“…Applying control techniques allows systems to suppress decoherence [25,26]. On the other hand, there are some situations in which the interactions between the quantum system and environment can produce quantum correlations such as entanglement revival [27,28]. In other words, environments may operate as control elements for these cases [29].…”

Section: Introductionmentioning

confidence: 99%

Generation of entanglement between quantum dot molecule with the presence of phonon effects in a voltage-controlled junction

Afsaneh,

Harouni

2021

Preprint

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We investigate the generation of entanglement through a quantum dot molecule under the influence of vibrational phonon modes in a bias voltage junction. The molecular quantum dot system is realized by coupled quantum dots inside a suspended carbon nanotube. We consider the dynamical entanglement as a function of bias voltage and temperature by taking into account the electron-phonon interaction. In order to generate the robust entanglement between quantum dots and preserve it to reach the maximal achievable amount steadily, we introduce an asymmetric coupling protocol and apply the easy tunable bias voltage-driven field. For an oscillating bias voltage, the time-varying entanglement can periodically reach the maximum revival. In thermal entanglement dynamics, the phenomena of thermal entanglement degradation and thermal entanglement revival are observed which are intensively affected by the strength of phonon decoherence. The revival of entanglement shows a larger value for a higher phonon coupling.

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“…Therefore, the study of the essential features of entanglement and its dynamical behavior under the decoherence of relevant quantum system have attracted much attention in recent years [2][3][4][5][6][7][8][9][10][11]. Yu and Eberly in [2] found that the entanglement of qubits under the Markovian decoherence can be terminated in a finite time despite the coherence of single qubit losing in an asymptotical manner [2].…”

Section: Introductionmentioning

confidence: 99%

Different entanglement dynamical behaviors due to initial system-environment correlations

et al. 2010

Self Cite

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We theoretically analyze the roles of initial correlations between a two-qubit system and a structured environment on entanglement dynamics of these two qubits. Considering two initial system-environment correlations, we show that the system-environment quantum correlation can initially increase the two-qubit entanglement, and the system-environment classical correlation would lead to the initially decreased two-qubit entanglement. Different two-qubit entanglement dynamics can be induced by these two initial systemenvironment correlations. However, under a certain condition, the roles of these two initial system-environment correlations on the two-qubit entanglement are the same.

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Dynamics of multipartite entanglement in the non-Markovian environments

Cited by 20 publications

References 26 publications

Decoherence Effects in a Three-Level System under Gaussian Process

Decoherence Effects in a Three-Level System under Gaussian Process

Generation of entanglement between quantum dot molecule with the presence of phonon effects in a voltage-controlled junction

Different entanglement dynamical behaviors due to initial system-environment correlations

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