Engineering two-mode entangled states between two superconducting resonators by dissipation

TL;DR

This paper proposes an experimentally feasible method to generate two-mode entangled states between superconducting resonators using dissipation, where qubit decay aids in stabilizing the entangled state.

Contribution

It introduces a novel scheme utilizing bichromatic microwave driving and dissipation to produce and stabilize two-mode entangled states in superconducting resonators.

Findings

Successful synthesis of two-mode squeezed vacuum states.

Qubit decay assists in stabilizing the entangled state.

The scheme is experimentally feasible with current technology.

Abstract

We present an experimental feasible scheme to synthesize two-mode continuous-variable entangled states of two superconducting resonators that are interconnected by two gap-tunable superconducting qubits. We show that, with each artificial atom suitably driven by a bichromatic microwave field to induce sidebands in the qubit-resonator coupling, the stationary state of the photon fields in the two resonators can be cooled and steered into a two-mode squeezed vacuum state via a dissipative quantum dynamical process, while the superconducting qubits remain in their ground states. In this scheme the qubit decay plays a positive role and can help drive the system to the target state, which thus converts a detrimental source of noise into a resource.