Atomic quantum transistor based on swapping operation

TL;DR

This paper introduces an atomic quantum transistor utilizing exchange interactions mediated by virtual photons, enabling control-SWAP operations and quantum entanglement in a nano-optical setup for quantum computing.

Contribution

It presents a novel atomic quantum transistor design based on exchange by virtual photons, demonstrating control-SWAP processes and entanglement in a coupled three-node atomic system.

Findings

Discovery of control-SWAP( heta) processes in quantum transistor operation

Demonstration of quantum entanglement between bright and dark qubit states

Potential application in quantum computing and multi-atomic physics

Abstract

We propose an atomic quantum transistor based on exchange by virtual photons between two atomic systems through the control gate-atom. The quantum transistor is realized in two QED cavities coupled in nano-optical scheme. We have found novel effect in quantum dynamics of coupled three-node atomic system which provides control-SWAP(\theta) processes in quantum transistor operation. New possibilities of quantum entanglement in an example of bright and dark qubit states have been demonstrated for quantum transport in the atomic chain. Potentialities of the proposed nano-optical design for quantum computing and fundamental issues of multi-atomic physics are also discussed.