Entanglement preservation in a system of two dipole–dipole interacting two-level atoms coupled with single mode cavity

Fasihi, M. A.

doi:10.1088/1402-4896/ab1036

Cited by 7 publications

(6 citation statements)

References 51 publications

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“…Inserting Eqs. (29)(30)(31)(32) into Eq. ( 17), we can get the density operator of the total system, i.e.…”

Section: Density Matrix Of Two V-type Atomsmentioning

confidence: 99%

“…In the past decades, many effectively regulating methods have been proposed in order to protect quantum entanglement of open systems. For example, the detuning of cavity field or environment [25,26], the feedback and memory effects of non-Markovian environment [27][28][29], the dipole-dipole interaction between atoms [30,31], the external classical driving [26,32], the auxiliary qubits * Electronic address: zhmzc1997@hunnu.edu.cn [33], the quantum Zeno effect [34], the quantum weak measurement and reversal can all effectively protect entanglement of qubits from decoherence [35][36][37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

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Modulating Entanglement Dynamics of Two V-type Atoms in Dissipative Cavity by Detuning, Weak Measurement and Reversal

Li,

Wang,

Zou

et al. 2024

Preprint

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In this paper, how to modulate entanglement dynamics of two V-type atoms in dissipative cavity by detuning, weak measurement and weak measurement reversal is studied. The analytical solution of this model is obtained by solving Schrodinger Equation after diagonalizing Hamiltonian of dissipative cavity. It is discussed in detail how the entanglement dynamics is in uenced by cavityenvironment coupling, spontaneously generated interference (SGI) parameter, detuning between cavity with environment and weak measurement reversal. The results show that the entanglement dynamics of different initial states obviously depends on coupling, SGI parameter, detuning and reversing measurement strength. The stronger coupling, the smaller SGI parameter, the larger detuning and the bigger reversing measurement strength can all not only protect but also generate the entanglement, and the detuning is more effectively in tne strong coupling regime than the weak measurement reversal, which is more effectively than the SGI parameter. We also give corresponding physical interpretations. PACS numbers: 03.65.Yz, 03.67.Lx, 42.50.-p, 42.50.Pq.

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“…Inserting Eqs. (29)(30)(31)(32) into Eq. ( 17), we can get the density operator of the total system, i.e.…”

Section: Density Matrix Of Two V-type Atomsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modulating Entanglement Dynamics of Two V-type Atoms in Dissipative Cavity by Detuning, Weak Measurement and Reversal

Li,

Wang,

Zou

et al. 2024

Preprint

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“…[42][43][44] Besides these, the dipole-dipole interaction between atoms can also protect the entanglement from sudden death. [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.…”

Section: Introductionmentioning

confidence: 99%

“…[ 42–44 ] Besides these, the dipole–dipole interaction between atoms can also protect the entanglement from sudden death. [ 45,46 ]…”

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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“…It has also been shown that the Zeno effect is a sufficient resource for the implementation of quantum logic gates 20,21 , which could be used as the basis of a quantum computer 21 or quantum repeaters 22 . The Zeno effect can also be used to prepare various nonclassical or entangled states [23][24][25][26][27] and to protect entanglement once it has been generated 28,29 . The anti-Zeno effect, by which repeated measurements increase the rate of transitions, may be useful in quantum heat engines 30 .…”

Section: Introductionmentioning

confidence: 99%

Inhibiting phase drift in multi-atom clocks using the quantum Zeno effect

Shringarpure

Franson

2022

Preprint

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The accuracy of an atomic clock depends in part on the bandwidth of the relevant atomic transitions. Here we consider an ensemble of atoms whose transition frequencies have been independently perturbed by environmental effects or other factors. We consider the possibility of using the quantum Zeno effect to lock the relative phase of the atoms, which would decrease their effective bandwidth by a factor of \(1/\sqrt N .\) We analyze an example in which the quantum Zeno effect can be used to lock the relative phase of a pair of atoms, after which the elapsed time can be determined. Practical applications may require \(N>>1\) in order to achieve a good signal-to-noise ratio.

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Entanglement preservation in a system of two dipole–dipole interacting two-level atoms coupled with single mode cavity

Cited by 7 publications

References 51 publications

Modulating Entanglement Dynamics of Two V-type Atoms in Dissipative Cavity by Detuning, Weak Measurement and Reversal

Modulating Entanglement Dynamics of Two V-type Atoms in Dissipative Cavity by Detuning, Weak Measurement and Reversal

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

Inhibiting phase drift in multi-atom clocks using the quantum Zeno effect

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