arXiv:quant-ph/0504159 · Journal of Physics B Atomic Molecular and Optical Physics

Spontaneous emission and teleportation in cavity QED

P P Munhoz, José Antonio Roversi, A. Vidiella-Barranco, F. L. Semião

Published Oct 17, 2005• 6 citations

Abstract

In this work, we consider atomic spontaneous emission in a system consisting of two identical two-level atoms interacting dispersively with the quantized electromagnetic field in a high-Q cavity. We investigate the destructive effect of the atomic decay on the generation of maximally entangled states, following the proposal by Zheng S B and Guo G C (2000 Phys. Rev. Lett. 85 2392). In particular, we analyze the fidelity of teleportation performed using such a noisy channel and calculatethe maximum spontaneous decay rate we may have in order to realize teleportation.

DOI: 10.1088/0953-4075/38/21/010

Related papers

Spontaneous emission and teleportation in cavity QED

P P Munhoz, J A Roversi, A Vidiella-barranco +1 more

Abstract. In this work, we consider atomic spontaneous emission in a system consisting of two identical two-level atoms interacting dispersively with the quantized electromagnetic field in a high-Q cavity. We investigate the destructive effect of the atomic decay on the generation of maximally entangled states, following the proposal by Zheng S B and Guo G C [2000 Phys. Rev. Lett. 85 2392]. In particular, we analyze the fidelity of teleportation performed using such a noisy channel.

Jan 1, 20053 citations

Teleportation of Atomic States in a Vacuum-Induced Environment

Liu Jin, Shao Bin, Shao-Hua Xiang +1 more

We present a scheme for teleporting atomic state through a dissipative quantum channel induced by spontaneous emission and investigate the destructive effect of the atomic decay on the success probability and the fidelity of teleportation associated to different channels. It is found that there exists an optimal channel to realize faithful teleportation.

Communications in Theoretical PhysicsJan 1, 20093 citations

High-fidelity atomic-state teleportation protocol with non-maximally-entangled states

Grzegorz Chimczak, R. Tanaś

We propose a protocol of the long-distance atomic-state teleportation via cavity decay, which allows for high-fidelity teleportation even with currently available optical cavities. The protocol is based on the scheme proposed by Bose et al. [Phys. Rev. Lett. 83, 5158 (1999)] but with one important modification: it employs non-maximally-entangled states instead of maximally entangled states.

arXiv:0904.1232Physical Review AApr 8, 200910 citations

Teleportation of an entangled atomic state using cavity-assisted collisions

Muhammad Irfan, Mudassar Aqueel Ahmad, Sajid Qamar +1 more

We present a scheme for the teleportation of two-qubit entangled atomic states using the idea of a quantum controlled-NOT gate, based on cavity-assisted collisions proposed by Zheng and Guo (2000 Phys. Rev. Lett. 85 2392). In this scheme, there is only virtual exchange of photons; thus the quantum information is not transferred between the atoms and the cavity field and so the decoherence time of the cavity is greatly enhanced.

Physica ScriptaFeb 3, 20120 citations

The effect of a non-zero spontaneous decay rate on teleportation

Grzegorz Chimczak, R. Tanaś

We discuss the influence of the spontaneous decay rate of the excited state on teleportation of the atomic state via cavity decay in the scheme of Bose et al (Bose S, Knight P L, Plenio M B and Vedral V 1999 Phys. Rev. Lett. 83 5158). We show that even a small but non-zero decay rate of the excited state leads to significant effects such as lowering the probability of successful teleportation if the product of the saturation parameter and the spontaneous decay rate is not negligible in comparison with the cavity mode decay rate. We compare analytical results obtained using adiabatic elimination with the results calculated numerically.

Journal of Optics B Quantum and Semiclassical OpticsNov 4, 200211 citations

Teleporting the one-qubit state via two-level atoms with spontaneous emission

Ming-Liang Hu

We study quantum teleportation via two two-level atoms coupled collectively to a multimode vacuum field and prepared initially in different atomic states. We concentrated on the influence of the spontaneous emission, collective damping and dipole–dipole interaction of the atoms on fidelity dynamics of quantum teleportation and obtained the region of spatial distance between the two atoms over which the state can be teleported nonclassically. Moreover, we showed through concrete examples that entanglement of the channel state is the prerequisite but not the only essential quantity for predicting the teleportation fidelity.

arXiv:1111.5964Journal of Physics B Atomic Molecular and Optical PhysicsApr 19, 20114 citations