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Влияние диполь-дипольного взаимодействия на мгновенную смерть перепутывания состояний двух атомов с вырожденными двухфотонными переходами

Eugene K. Bashkirov, Анна Михайловна Евдокимова, Михаил Сергеевич Мастюгин

Published Jan 1, 2011• 0 citations
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Abstract

The influence of dipole-dipole interaction on the entanglement between two atoms with different initial W-like states in Tavis-Cummings model with degen erate two-photon transitions has been investigated. The results show that the entanglement between two atoms can be increased by means of dipole-dipole interaction and for some initial states the sudden death effect can be weakened.

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The entanglement dynamics involving the so-called entanglement sudden death of atoms in two-photon Tavis-Cummings model is investigated.Various initial conditions that may have influences on the entanglement evolution of atoms, especially on the appearance of atomic entanglement sudden death, are studied.The appearance of entanglement sudden death is sensitive to the initial conditions of the whole system, i.e., the concrete type of atomic initial state, the photon number in the cavity field, and the dipole-dipole interaction between atoms.It is shown that the strong dipole-dipole interaction between atoms can weaken the atomic entanglement sudden death.

Chinese Optics Letters•Jan 1, 2010•2 citations
The influence of dipole-dipole interaction on the entanglement between two atoms with different initial W-like states in Tavis-Cummings model with degen erate two-photon transitions has been investigated. The results show that the entanglement between two atoms can be increased by means of dipole-dipole interaction and for some initial states the sudden death effect can be weakened.
The influences of dipole-dipole interaction and detuning on the entanglement between two atoms with different initial tripartite entangled W -like states in the Tavis–Cummings model have been investigated by means of Wootters' concurrence, respectively. The results show that the entanglement between the two atoms can be enhanced via appropriately tuning the strength of dipole-dipole interaction of two atoms or the detunings between atom and cavity, and the so-called sudden death effect can be weakened simultaneously.
Исследовано влияние диполь-дипольного взаимодействия на перепутывание состояний двух атомов и одномодового поля в многофотонной моделиТависа  Каммингса в случае когерентного состояния резонаторного поля.Найдено, что диполь-дипольное взаимодействие приводит к стабилизацииатом-полевого перепутывания в случае однофотонной модели.
The entanglement dynamics involving the so-called entanglement sudden death of atoms in two-photon Tavis-Cummings model is investigated.Various initial conditions that may have influences on the entanglement evolution of atoms, especially on the appearance of atomic entanglement sudden death, are studied.The appearance of entanglement sudden death is sensitive to the initial conditions of the whole system, i.e., the concrete type of atomic initial state, the photon number in the cavity field, and the dipole-dipole interaction between atoms.It is shown that the strong dipole-dipole interaction between atoms can weaken the atomic entanglement sudden death.