Qubit–qubit entanglement mediated by epsilon-near-zero waveguide reservoirs

Abstract

This work investigates qubit entanglement in rolled-up and plasmonic rectangular epsilon-near-zero (ENZ) waveguide reservoirs. We explore the robust entanglement of qubits coupled to these reservoirs using the concurrence metric formalism and the emergence of driven steady-state entanglement under continuous pumping. The results indicate that the proposed rolled-up ENZ waveguide shows a high long-range entanglement of qubits embedded within as compared to the rectangular ENZ waveguide channel.