Entanglement of qubits via a nonlinear resonator

TL;DR

This paper investigates how a nonlinear resonator can coherently entangle two qubits, with entanglement depending on nonlinearity strength and initial states, and persists despite decoherence.

Contribution

It demonstrates the role of nonlinearity in mediating qubit entanglement and analyzes its robustness against decoherence.

Findings

Entanglement depends on the resonator's nonlinearity and initial conditions.

Entanglement persists despite decoherence effects.

Nonlinear resonators can effectively mediate qubit interactions.

Abstract

Coherent coupling of two qubits mediated by a nonlinear resonator is studied. It is shown that the amount of entanglement accessible in the evolution depends both on the strength of nonlinearity in the Hamiltonian of the resonator and on the initial preparation of the system. The created entanglement survives in the presence of decoherence.