State-independent teleportation of an atomic state between two cavities

TL;DR

This paper proposes a robust scheme for teleporting an unknown atomic state between two separated cavities that maintains high fidelity despite losses and inefficiencies, using a balanced damping approach over two interaction-detection cycles.

Contribution

It introduces a novel teleportation protocol that is independent of the teleported state and resilient to common experimental imperfections.

Findings

Fidelity is independent of the teleported state.

The scheme is insensitive to atomic spontaneous emission and cavity decay.

It outperforms previous schemes in robustness against losses.

Abstract

A scheme is presented for the teleportation of an unknown atomic state between two separated cavities. The scheme involves two interaction-detection cycles and uses resonantly coupled atoms with an additional ground state not coupled to the cavity field. Remarkably, the damping of one basis state is balanced by that of the other basis state and the state with photon loss in the first interaction-detection cycle is eliminated by the second cycle. Therefore, the fidelity of teleportation is independent of the teleported state and insensitive to the atomic spontaneous emission, cavity decay, and detection inefficiency, which is obviously in contrast to the original scheme by Bose et al. Phys. Rev. Lett. 83 5158 (1999).