Enhancing quantum teleportation efficacy with noiseless linear amplification
Date
2023
Authors
Zhao, Jie
Jeng, Hao
Conlon, Lorcan
Tserkis, Spyros
Shajilal, Biveen
Liu, Kui
Ralph, Timothy C.
Assad, Syed
Lam, Ping
Journal Title
Journal ISSN
Volume Title
Publisher
Springer Nature
Abstract
Quantum teleportation constitutes a fundamental tool for various applications in quantum communication and computation. However, state-of-the-art continuous-variable quantum teleportation is restricted to moderate fidelities and short-distance configurations. This is due to unavoidable experimental imperfections resulting in thermal decoherence during the teleportation process. Here we present a heralded quantum teleporter able to overcome these limitations through noiseless linear amplification. As a result, we report a high fidelity of 92% for teleporting coherent states using a modest level of quantum entanglement. Our teleporter in principle allows nearly complete removal of loss induced onto the input states being transmitted through imperfect quantum channels. We further demonstrate the purification of a displaced thermal state, impossible via conventional deterministic amplification or teleportation approaches. The combination of high-fidelity coherent state teleportation alongside the purification of thermalized input states permits the transmission of quantum states over significantly long distances. These results are of both practical and fundamental significance; overcoming long-standing hurdles en route to highly-efficient continuous-variable quantum teleportation, while also shining new light on applying teleportation to purify quantum systems from thermal noise.
Description
Keywords
Citation
Collections
Source
Nature Communications
Type
Journal article
Book Title
Entity type
Access Statement
Open Access
License Rights
Creative Commons Attribution licence
Restricted until
Downloads
File
Description