Cargando…

Femtosecond Laser Direct Writing of Integrated Photonic Quantum Chips for Generating Path-Encoded Bell States

Integrated photonic quantum chip provides a promising platform to perform quantum computation, quantum simulation, quantum metrology and quantum communication. Femtosecond laser direct writing (FLDW) is a potential technique to fabricate various integrated photonic quantum chips in glass. Several qu...

Descripción completa

Detalles Bibliográficos
Autores principales: Li, Meng, Zhang, Qian, Chen, Yang, Ren, Xifeng, Gong, Qihuang, Li, Yan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7765531/
https://www.ncbi.nlm.nih.gov/pubmed/33334077
http://dx.doi.org/10.3390/mi11121111
_version_ 1783628511942017024
author Li, Meng
Zhang, Qian
Chen, Yang
Ren, Xifeng
Gong, Qihuang
Li, Yan
author_facet Li, Meng
Zhang, Qian
Chen, Yang
Ren, Xifeng
Gong, Qihuang
Li, Yan
author_sort Li, Meng
collection PubMed
description Integrated photonic quantum chip provides a promising platform to perform quantum computation, quantum simulation, quantum metrology and quantum communication. Femtosecond laser direct writing (FLDW) is a potential technique to fabricate various integrated photonic quantum chips in glass. Several quantum logic gates fabricated by FLDW have been reported, such as polarization and path encoded quantum controlled-NOT (CNOT) gates. By combining several single qubit gates and two qubit gates, the quantum circuit can realize different functions, such as generating quantum entangled states and performing quantum computation algorithms. Here we demonstrate the FLDW of integrated photonic quantum chips composed of one Hadamard gate and one CNOT gate for generating all four path-encoded Bell states. The experimental results show that the average fidelity of the reconstructed truth table reaches as high as 98.8 [Formula: see text] 0.3%. Our work is of great importance to be widely applied in many quantum circuits, therefore this technique would offer great potential to fabricate more complex circuits to realize more advanced functions.
format Online
Article
Text
id pubmed-7765531
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-77655312020-12-27 Femtosecond Laser Direct Writing of Integrated Photonic Quantum Chips for Generating Path-Encoded Bell States Li, Meng Zhang, Qian Chen, Yang Ren, Xifeng Gong, Qihuang Li, Yan Micromachines (Basel) Article Integrated photonic quantum chip provides a promising platform to perform quantum computation, quantum simulation, quantum metrology and quantum communication. Femtosecond laser direct writing (FLDW) is a potential technique to fabricate various integrated photonic quantum chips in glass. Several quantum logic gates fabricated by FLDW have been reported, such as polarization and path encoded quantum controlled-NOT (CNOT) gates. By combining several single qubit gates and two qubit gates, the quantum circuit can realize different functions, such as generating quantum entangled states and performing quantum computation algorithms. Here we demonstrate the FLDW of integrated photonic quantum chips composed of one Hadamard gate and one CNOT gate for generating all four path-encoded Bell states. The experimental results show that the average fidelity of the reconstructed truth table reaches as high as 98.8 [Formula: see text] 0.3%. Our work is of great importance to be widely applied in many quantum circuits, therefore this technique would offer great potential to fabricate more complex circuits to realize more advanced functions. MDPI 2020-12-15 /pmc/articles/PMC7765531/ /pubmed/33334077 http://dx.doi.org/10.3390/mi11121111 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Meng
Zhang, Qian
Chen, Yang
Ren, Xifeng
Gong, Qihuang
Li, Yan
Femtosecond Laser Direct Writing of Integrated Photonic Quantum Chips for Generating Path-Encoded Bell States
title Femtosecond Laser Direct Writing of Integrated Photonic Quantum Chips for Generating Path-Encoded Bell States
title_full Femtosecond Laser Direct Writing of Integrated Photonic Quantum Chips for Generating Path-Encoded Bell States
title_fullStr Femtosecond Laser Direct Writing of Integrated Photonic Quantum Chips for Generating Path-Encoded Bell States
title_full_unstemmed Femtosecond Laser Direct Writing of Integrated Photonic Quantum Chips for Generating Path-Encoded Bell States
title_short Femtosecond Laser Direct Writing of Integrated Photonic Quantum Chips for Generating Path-Encoded Bell States
title_sort femtosecond laser direct writing of integrated photonic quantum chips for generating path-encoded bell states
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7765531/
https://www.ncbi.nlm.nih.gov/pubmed/33334077
http://dx.doi.org/10.3390/mi11121111
work_keys_str_mv AT limeng femtosecondlaserdirectwritingofintegratedphotonicquantumchipsforgeneratingpathencodedbellstates
AT zhangqian femtosecondlaserdirectwritingofintegratedphotonicquantumchipsforgeneratingpathencodedbellstates
AT chenyang femtosecondlaserdirectwritingofintegratedphotonicquantumchipsforgeneratingpathencodedbellstates
AT renxifeng femtosecondlaserdirectwritingofintegratedphotonicquantumchipsforgeneratingpathencodedbellstates
AT gongqihuang femtosecondlaserdirectwritingofintegratedphotonicquantumchipsforgeneratingpathencodedbellstates
AT liyan femtosecondlaserdirectwritingofintegratedphotonicquantumchipsforgeneratingpathencodedbellstates