Quantum coherence of multiqubit states in correlated noisy channels

Hu, Ming‐Liang; Fan, Heng

doi:10.1007/s11433-019-1462-9

Cited by 61 publications

(33 citation statements)

References 57 publications

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“…As coherence itself is a precious resource for quantum computing and the related quantum tasks, it is vital to seek flexible methods to protect coherence. The previous studies showed that the decoherence effects could be suppressed by taking full advantage of the initial system-bath correlation, [46] the correlations between consecutive actions of a noisy channel, [47,48] and the quantum-jump-based feedback. [49] Besides, the coherence might also be frozen under specific conditions.…”

Section: Msc In Multiple Bosonic Reservoirsmentioning

confidence: 99%

Maximal Steered Coherence and Its Conversion to Entanglement in Multiple Bosonic Reservoirs

2021

Annalen der Physik

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The remote control of coherence is a crucial step for its application in quantum computation. The maximal steered coherence (MSC) and its conversion to entanglement in multiple bosonic reservoirs are investigated. It is shown that the MSC decays with time in the Markovian regime and behaves as damped oscillations in the non-Markovian regime. The MSC can also be connected directly to the strength of non-Markovianity, through which it is shown that it can be noticeably enhanced by taking full advantage of the non-Markovian effects. Besides, the MSC can be converted completely to entanglement via optimal incoherent operation applied to the steered qubit and an incoherent ancilla which is immune to decoherence, and the generated entanglement is stronger than the shared entanglement in prior. These findings suggest a potential way for remotely generating and manipulating coherence and entanglement in noisy environments.

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Section: Msc In Multiple Bosonic Reservoirsmentioning

confidence: 99%

Maximal Steered Coherence and Its Conversion to Entanglement in Multiple Bosonic Reservoirs

2021

Annalen der Physik

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“…The quantum coherence of two-qubit systems through noisy channels is also studied, where several types of quantum channels with memory are considered [43]. Moreover, the phenomenon of coherence in multiqubit systems traversing the correlated quantum channels is considered and two remarkable quantum phenomena that can be used for protecting and controlling the quantum coherence are demonstrated [44]. In the present manuscript, we examine the phenomenon of coherence for a class of two-qubit states using Kossakowski-type quantum dynamical semigroups (KTQDSs) of completely positive maps (CPMs).…”

Section: Introductionmentioning

confidence: 99%

Coherence Trapping in Open Two-Qubit Dynamics

et al. 2021

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In this manuscript, we examine the dynamical behavior of the coherence in open quantum systems using the l1 norm. We consider a two-qubit system that evolves in the framework of Kossakowski-type quantum dynamical semigroups (KTQDSs) of completely positive maps (CPMs). We find that the quantum coherence can be asymptotically maintained with respect to the values of the system parameters. Moreover, we show that the quantum coherence can resist the effect of the environment and preserve even in the regime of long times. The obtained results also show that the initially separable states can provide a finite value of the coherence during the time evolution. Because of such properties, several states in this type of environments are good candidates for incorporating quantum information and optics (QIO) schemes. Finally, we compare the dynamical behavior of the coherence with the entire quantum correlation.

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“…Coherence, along with many other quantum properties, is often studied without considering the influence of the environment on the quantum systems. Recently, many works have been focused on the dynamics of the quantum coherence under the effect of the external environment [36][37][38][39][40][41][42][43][44][45]. Based the above considerations, the purpose of this paper is to investigate the effect of atom distance and reservoir temperature on the evolution of quantum coherence and total correlation considering DDI and CDE.…”

Section: Introductionmentioning

confidence: 99%

Quantum Coherence of Atoms with Dipole–Dipole Interaction and Collective Damping in the Presence of an Optical Field

et al. 2021

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We investigate the effect of the interatomic distances and thermal reservoir on the coherence dynamics of the atoms considering the dipole–dipole interaction (DDI) and collective damping effect (CDE). We show that the control and protection of the coherence are very sensitive to the interatomic distances and reservoir temperature. Furthermore, we explore the distance effect between atoms and reservoir temperature on the time evolution of the total quantum correlation between the two atoms. The obtained results could be useful to execute these quantum phenomena and also considered as a good indication to implement realistic experiments with optimal conditions.

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Quantum coherence of multiqubit states in correlated noisy channels

Cited by 61 publications

References 57 publications

Maximal Steered Coherence and Its Conversion to Entanglement in Multiple Bosonic Reservoirs

Maximal Steered Coherence and Its Conversion to Entanglement in Multiple Bosonic Reservoirs

Coherence Trapping in Open Two-Qubit Dynamics

Quantum Coherence of Atoms with Dipole–Dipole Interaction and Collective Damping in the Presence of an Optical Field

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