Scalable Generation and Detection of on-Demand W States in Nanophotonic Circuits
| Autor: | Jun Gao, Leonardo Santos, Govind Krishna, Ze-Sheng Xu, Adrian Iovan, Stephan Steinhauer, Otfried Gühne, Philip J. Poole, Dan Dalacu, Val Zwiller, Ali W. Elshaari |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Nano Letters. |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.3c01551 |
| Popis: | Quantum physics phenomena, entanglement and coherence, are crucial for quantum information protocols, but understanding these in systems with more than two parts is challenging due to increasing complexity. The W state, a multipartite entangled state, is notable for its robustness and benefits in quantum communication. Here, we generate an 8-mode on-demand single photon W states, using nanowire quantum dots and a silicon nitride photonic chip. We demonstrate a reliable, scalable technique for reconstructing W-state in photonic circuits using Fourier and real-space imaging, supported by the Gerchberg-Saxton phase retrieval algorithm. Additionally, we utilize an entanglement witness to distinguish between mixed and entangled states, thereby affirming the entangled nature of our generated state. The study provides a new imaging approach of assessing multipartite entanglement in W-states, paving the way for further progress in image processing and Fourier-space analysis techniques for complex quantum systems. |
| Databáze: | OpenAIRE |
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