Entanglement generation between unstable optically active qubits without photodetectors

TL;DR

This paper introduces a robust, detector-free method for generating high-fidelity entanglement between optically active qubits, effective even under significant environmental decoherence, with potential applications in distributed quantum computing.

Contribution

It presents a novel deterministic scheme using stimulated Raman adiabatic passage that does not require photodetectors, suitable for poor optically active states and high decoherence environments.

Findings

Achieves high-fidelity entanglement without photodetectors

Effective even when decoherence rate matches atom-photon coupling

Potential applications in distributed quantum computing

Abstract

We propose a robust deterministic scheme to generate entanglement at high fidelity without the need of photodetectors even for quantum bits, qubits, with extremely poor optically active states. Our protocol employs stimulated Raman adiabatic passage for population transfer without actually exciting the system. Furthermore, it is found to be effective even if the environmental decoherence rate is of the same order of magnitude as the atom--photon coupling frequency. Our scheme holds potential to solve entanglement generation problems, e.g., in distributed quantum computing.