Entanglement of two qubits mediated by one-dimensional plasmonic waveguides

TL;DR

This paper studies how two qubits can become entangled through one-dimensional plasmonic waveguides, demonstrating the potential for long-distance entanglement formation and steady-state entanglement under continuous pumping.

Contribution

It reveals the possibility of achieving significant qubit-qubit entanglement at distances exceeding the wavelength using existing plasmonic waveguides, including both spontaneous and driven scenarios.

Findings

Large concurrence values are attainable at distances greater than the wavelength.

Both spontaneous and steady-state entanglement can be achieved.

Plasmonic waveguides enable long-range qubit entanglement.

Abstract

We investigate qubit-qubit entanglement mediated by plasmons supported by one-dimensional waveguides. We explore both the situation of spontaneous formation of entanglement from an unentangled state and the emergence of driven steady-state entanglement under continuous pumping. In both cases, we show that large values for the concurrence are attainable for qubit-qubit distances larger than the operating wavelength by using plasmonic waveguides that are currently available.