Exponentially Enhanced Scheme for the Heralded Qudit Greenberger-Horne-Zeilinger State in Linear Optics

被引：0
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作者：
Chin, Seungbeom [1 ,2 ]
Ryu, Junghee [3 ,4 ]
Kim, Yong-Su [5 ,6 ]
机构：
[1] Okinawa Institute of Science and Technology Graduate University, Okinawa,904-0495, Japan
[2] Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon,16419, Korea, Republic of
[3] Center for Quantum Information Research and Development, Korea Institute of Science and Technology Information, Daejeon,34141, Korea, Republic of
[4] Division of Quantum Information, KISTI School, Korea University of Science and Technology, Daejeon,34141, Korea, Republic of
[5] Center for Quantum Information, Korea Institute of Science and Technology (KIST), Seoul,02792, Korea, Republic of
[6] Division of Quantum Information Technology, KIST School, Korea University of Science and Technology, Seoul,02792, Korea, Republic of
来源：
Physical Review Letters | 2024年 / 133卷 / 25期
关键词：
High-dimensional multipartite entanglement plays a crucial role in quantum information science. However; existing schemes for generating such entanglement become complex and costly as the dimension of quantum units increases. In this Letter; we overcome the limitation by proposing a significantly enhanced linear optical heralded scheme that generates the d-level N-partite Greenberger-Horne-Zeilinger (GHZ) state with single-photon sources and linear operations. Our scheme requires dN photons; which is the minimal required photon number; with substantially improved success probability from previous schemes. It employs linear optical logic gates compatible with any qudit encoding system and can generate generalized GHZ states with installments of beam splitters. With efficient generations of high-dimensional resource states; our work opens avenues for further exploration in high-dimensional quantum information processing. © 2024 American Physical Society;
D O I：
10.1103/PhysRevLett.133.253601
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