Preserving entanglement in a solid-spin system using quantum autoencoders
|Corresponding Author||Xu，Nanyang; Lu，Dawei|
Entanglement, as a key resource for modern quantum technologies, is extremely fragile due to the decoherence. Here, we show that a quantum autoencoder, which is trained to compress a particular set of quantum entangled states into a subspace that is robust to decoherence, can be employed to preserve entanglement. The training process is based on a hybrid quantum-classical approach to improve the efficiency in building the autoencoder and reduce the experimental errors during the optimization. Using nitrogen-vacancy centers in diamond, we demonstrate that the entangled states between the electron and nuclear spins can be encoded into the nucleus subspace, which has much longer coherence time. As a result, lifetime of the Bell states in this solid-spin system is extended from 2.22 ± 0.43 μs to 3.03 ± 0.56 ms, yielding a three orders of magnitude improvement. The quantum autoencoder approach is universal, paving the way of utilizing long lifetime nuclear spins as immediate-access quantum memories in quantum information tasks.
NI Journal Papers
National Key Research and Development Program of China["2018YFA0306600","2019YFA0308100","2020YFA0309400"] ; National Natural Science Foundation of China["12075110","11975117","11905099","11875159"] ; Guangdong International Collaboration Program[2020A0505100001] ; Science, Technology and Innovation Commission of Shenzhen Municipality["KQTD20190929173815000","JCYJ20200109140803865"] ; Guangdong Innovative and Entrepreneurial Research Team Program[2019ZT08C044] ; Guangdong Provincial Key Laboratory[2019B121203002] ; Major Scientific Project[2019MB0AE03] ; Research Initiation Project of Zhejiang Laboratory[K2022MB0PI02]
|WOS Research Area|
|WOS Accession No|
|ESI Research Field|
Cited Times [WOS]:1
|Document Type||Journal Article|
|Department||Department of Physics|
1.Research Center for Quantum Sensing,Zhejiang Lab,Hangzhou,311000,China
2.Shenzhen Institute for Quantum Science and Engineering,Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
3.School of Physics,Hefei University of Technology,Hefei,Anhui,230009,China
|Corresponding Author Affilication||Department of Physics; Institute for Quantum Science and Engineering|
Zhou，Feifei,Tian，Yu,Song，Yumeng,et al. Preserving entanglement in a solid-spin system using quantum autoencoders[J]. APPLIED PHYSICS LETTERS,2022,121(13).
Zhou，Feifei.,Tian，Yu.,Song，Yumeng.,Qiu，Chudan.,Wang，Xiangyu.,...&Lu，Dawei.(2022).Preserving entanglement in a solid-spin system using quantum autoencoders.APPLIED PHYSICS LETTERS,121(13).
Zhou，Feifei,et al."Preserving entanglement in a solid-spin system using quantum autoencoders".APPLIED PHYSICS LETTERS 121.13(2022).
|Files in This Item:||There are no files associated with this item.|
|Recommend this item|
|Export to Endnote|
|Export to Excel|
|Export to Csv|
|Similar articles in Google Scholar|
|Similar articles in Baidu Scholar|
|Similar articles in Bing Scholar|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.