Protection of entanglement for a two-qutrit V-type open system on the basis of system-reservoir bound states

Ahansaz, Bahram; Behzadi, Naghi; Faizi, E.

doi:10.1140/epjd/e2019-90402-0

Cited by 7 publications

(8 citation statements)

References 23 publications

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“…In the following, we derive the dynamics of an open V-type three-level atomic system in the presence of () additional systems 31 . To this aim, we obtain the exact dynamics of a system consisting of non-interacting V-type three-level atoms in a common reservoir as considered in case II.…”

Section: Methodsmentioning

confidence: 99%

Quantum speedup, non-Markovianity and formation of bound state

Ahansaz

Ektesabi

2019

Sci Rep

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In this paper, we investigate the relationship between the quantum speedup, non-Markovianity and formation of a system-environment bound state. Previous results show a monotonic relation between these three such that providing bound states with more negative energy can lead to a higher degree of non-Markovianity, and hence to a greater speed of quantum evolution. By studying dynamics of a dissipative two-level system or a V-type three-level system, when similar and additional systems are present, we reveal that the quantum speedup is exclusively related to the formation of the system-environment bound state, while the non-Markovian effect of the system dynamics is neither necessary nor sufficient to speed up the quantum evolution. On the other hand, it is shown that only the formation of the system-environment bound state plays a decisive role in the acceleration of the quantum evolution.

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Section: Methodsmentioning

confidence: 99%

Quantum speedup, non-Markovianity and formation of bound state

Ahansaz

Ektesabi

2019

Sci Rep

Self Cite

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“…In recent years, open qutrit systems are also concerned and the methods of protecting entanglement in open qubit systems have also been used to the qutrit systems because the latter is superior physical resources than the former in quantum information processing. For instance, the auxiliary quantum qutrits, [ 47 ] the classical driving field, [ 48 ] the weak measurement and the measurement reversal [ 49–52 ] are also effective ways in protecting and regulating entanglement of qutrit systems. In addition, a lot of progress has been made in the experimental implementation of realistic systems.…”

Section: Introductionmentioning

confidence: 99%

“…[45,46] In recent years, open qutrit systems are also concerned and the methods of protecting entanglement in open qubit systems have also been used to the qutrit systems because the latter is superior physical resources than the former in quantum information processing. For instance, the auxiliary quantum qutrits, [47] the Figure 1. Two identical V-type qutrit atomic system interacts with a dissipative cavity, which couples with an external environment.…”

Section: Introductionmentioning

confidence: 99%

Entanglement Dynamics of Two V‐type Atoms with Dipole–Dipole Interaction in Dissipative Cavity

et al. 2023

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In this work, a coupled system of two V-type atoms with dipole-dipole interaction in a dissipative single-mode cavity, which couples with an external environment, is studied. The analytical solution of this model is obtained by solving the time dependent Schrodinger equation after Hamiltonian of dissipative cavity is diagonalized by introducing a set of new creation and annihilation operators according to Fano theorem. It is also discussed in detail how the entanglement dynamics of different initial states are influenced by the cavity-environment coupling, the spontaneously generated interference (SGI) parameter, and the dipole-dipole interaction between two atoms . The results show that the SGI parameter has different effects on entanglement dynamics under different initial states. Namely, the SGI parameter will increase the decay rate of the initially maximal entangled state and reduce that of the initially partial entangled state. For the initially product state, the larger SGI parameter corresponds to the more entanglement generated. The entanglement monotonically decreases under the weak cavity-environment coupling, while the oscillation of entanglement will occur under the strong cavity-environment coupling. The larger the dipole-dipole interaction is, the slower the entanglement decays and the more the entanglement will be generated. So the dipole-dipole interaction can not only protect and generate entanglement very effectively, but also enhance the regulation effect of the SGI parameter on entanglement.

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“…Wei Jiang et al investigated Non-Markovian entanglement dynamics of open quantum systems with continuous measurement feedback [35]. Bahram Ahansaz et al presented a method of entanglement protection for a two-qutrit V-type open system on the basis of system-reservoir bound states [36]. Andrey R. Kolovsky revisited the Born-Markov approximation for an open quantum system by considering a microscopic model of the bath [37].…”

Section: Introductionmentioning

confidence: 99%

Entanglement dynamics of an open moving-biparticle system driven by classical-field

Wang,

Liu,

Zou

et al. 2022

Preprint

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In this work, the entanglement dynamics of a moving-biparticle system driven by an external classical field is investigated, where the moving-biparticle system is coupled with a zero temperature common environment. The analytical expressions of the density operator and the entanglement concurrence can be obtained when the total excitation number is one. We also discuss in detail the effects of different parameters on the entanglement dynamics. The results show that the classical driving can effectively eliminate the influence of the qubit velocity and the detuning on the quantum entanglement.

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Protection of entanglement for a two-qutrit V-type open system on the basis of system-reservoir bound states

Cited by 7 publications

References 23 publications

Quantum speedup, non-Markovianity and formation of bound state

Quantum speedup, non-Markovianity and formation of bound state

Entanglement Dynamics of Two V‐type Atoms with Dipole–Dipole Interaction in Dissipative Cavity

Entanglement dynamics of an open moving-biparticle system driven by classical-field

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