The Influence of Counter Rotating Terms on the Entanglement Dynamics of Two Dipole-Coupled Qutrits Interacting with a Two-Mode Field: Intensity-Dependent Coupling Approach

Jahanbakhsh, Farshid; Tavassoly, M. K.

doi:10.1007/s10773-022-05096-9

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“…For instance, in quantum open systems, the effects of these terms on the non-Markovianity of the system have been investigated in [54]. The influence of the mentioned terms on various physical quantities such as entanglement dynamics [55][56][57][58][59][60] and atomic population inversion [59,61,62] have been discussed in different quantum interacting systems. In this respect, due to the fact that (i) the atom-field interaction has a key role in a variety of teleportation protocols dealing with the cavity QED method, and (ii) since it may be possible to perform atom-field interaction in the strong regimes, in order to investigate the effects of the mentioned terms in the teleportation of unknown states of a qubit (or a field) in the strong coupling regime, in the present work we use the Rabi model [51,63,64] instead of JCM in the necessary processes of performing the protocol.…”

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confidence: 99%

Teleportation of unknown states of a qubit and a single-mode field in strong coupling regime without Bell-state measurement

Jahanbakhsh

Tavassoly

2023

Commun. Theor. Phys.

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In this paper we develop the teleportation scheme in [Zheng in Phys Rev A 69, 064302, 2004], in the sense that, we work in the strong atom-field coupling regime, wherein the rotating wave approximation (RWA) is no longer valid. To achieve the purpose, a scheme consisting of a qubit interacting with a single-mode quantized field is described via the Rabi model (counter rotation terms are taken into account). Our first aim is to teleport an unknown atomic state of a qubit (which interacts with the quantized field in a cavity) to a second qubit (exists in another distant cavity field), beyond the RWA and without Bell-state measurement (BSM) method. In the continuation, in a similar way, we teleport an unknown state of a single-mode field, too. In fact, it is shown that, in this regime, after applying some particular conditions, containing the interaction time of atom-field in the cavities, adjusting the involved frequencies, as well as the atom-field coupling in the model, if a proper measurement is performed on the state of the first qubit (the related field in the cavity), the unknown states of the qubit (field) can be teleported from the first qubit (cavity field) to the second qubit (cavity field), appropriately. We show that, in both considered cases, the teleportation protocol is successfully performed with the maximum possible fidelity, 1, and the acceptable success probability 0.25.

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