Deterministic and universal quantum squeezing gate in virtue of teleportation-like protocol

TL;DR

This paper introduces a deterministic, universal quantum squeezing gate based on a teleportation-like protocol, achieving high fidelity operations up to 10 dB squeezing and enabling complex quantum information processing tasks.

Contribution

The authors develop and demonstrate a new non-local, deterministic squeezing gate that overcomes previous limitations of success probability and squeezing degree in quantum information processing.

Findings

Achieved high fidelity squeezing up to 10 dB

Demonstrated complex operations including Fourier and phase squeezing gates

Potential applications in distributed quantum processing and error correction

Abstract

Squeezing transformation as an essential component, gives rise to the possibility to perform various tasks of quantum information processing. However, the reported squeezing gate with best performance so far is a conditional realization at the expense of low success probability, while the performance of the deterministic ones is currently circumscribed by the limited squeezing degree of the non-classical ancilla. To address this issue, we develop and demonstrate a new scheme of deterministic and universal quantum squeezing gate with the property of non-local operation attributed to the teleportation-like protocol. We demonstrate high fidelity squeezing operation, even when the level of target squeezing being up to 10 dB, where a squeezed state with non-classical noise reduction of 6.5 dB is directly observed. Moreover, we perform a high-fidelity complex operation including a Fourier transformation and a phase squeezing gate, exploring the potential of implementing the complex task of quantum information processing with the presented functional unit. Our method can be applied to distributed quantum processor, the creation of exotic non-classical states, and quantum error correction.