Deterministic amplification of Schroedinger cat states in circuit quantum electrodynamics

TL;DR

This paper introduces a deterministic method for amplifying Schrödinger cat states in circuit QED systems, enabling improved quantum information processing with non-classical states.

Contribution

It presents a novel dynamical scheme for deterministic amplification of photonic Schrödinger cat states using optimal state transfers in superconducting circuits.

Findings

The scheme is feasible with current superconducting circuit technology.

Full simulations confirm the effectiveness of the amplification process.

Potential applications in quantum information processing are demonstrated.

Abstract

We propose a dynamical scheme for deterministically amplifying photonic Schroedinger cat states based on a set of optimal state-transfers. The scheme can be implemented in strongly coupled qubit-cavity systems and is well suited to the capabilities of state of the art superconducting circuits. The ideal analytical scheme is compared with a full simulation of the open Jaynes-Cummings model with realistic device parameters. This amplification tool can be utilized for practical quantum information processing in non-classical continuous-variable states.