Photon-phonon quantum cloning in optomechanical system

TL;DR

This paper proposes a hybrid optomechanical system enabling high-fidelity, controllable quantum cloning between solid-state and flying qubits, overcoming fundamental limitations and allowing tunable cloning methods for quantum information processing.

Contribution

It introduces a novel hybrid optomechanical scheme that achieves near-optimal probabilistic and deterministic quantum cloning with tunable switching capabilities.

Findings

Achieves high-fidelity quantum cloning close to the theoretical limit.

Demonstrates tunable switching between probabilistic and deterministic cloning.

Provides a feasible platform for experimental realization of quantum cloning.

Abstract

Quantum cloning is an essential operation in quantum information and quantum computing. Similar to the `copy' operation in classical computing, the cloning of flying bits for further processing from the solid-state quantum bits in storage is an operation frequently used in quantum information processing. Here we propose a high-fidelity and controllable quantum cloning scheme between solid bits and flying bits. In order to overcome the obstacles from the no-cloning theorem and the weak phonon-photon interaction, we introduce a hybrid optomechanical system that performs both the probabilistic cloning and deterministic cloning closed to the theoretical optimal limit with the help of designed driving pulse in the presence of dissipation. In addition, our scheme allows a highly tunable switching between two cloning methods, namely the probabilistic and deterministic cloning, by simply changing the input laser pulse. This provides a promising platform for experimental executability.