Resource-efficient linear-optical generation of GHZ-like states

• URL: http://arxiv.org/abs/2509.14794v2
• Date: Fri, 07 Nov 2025 14:55:24 GMT
• Title: Resource-efficient linear-optical generation of GHZ-like states
• Authors: Suren A. Fldzhyan, Stanislav S. Straupe, Mikhail Yu. Saygin,
• Abstract summary: We introduce a theoretical framework that has been numerically validated, demonstrating the capacity to generate GHZ-like states incrementally from non-logical intermediate states.<n>Our findings indicate that while not a universal solution, non-maximally entangled states offer practical advantages for specific photonic quantum information tasks.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Heralded multi-photon entanglement generation is a central bottleneck for photonic quantum computing, where resource costs typically skyrocket with target size. We explore efficient methods for generating photon states with tunable entanglement, providing a flexible tool for quantum state engineering. We introduce a theoretical framework that has been numerically validated, demonstrating the capacity to generate GHZ-like states incrementally from non-logical intermediate states. We demonstrate that in certain scenarios $-$ such as reducing the resource cost for building large maximally entangled GHZ states $-$ these variable-entanglement states can outperform their fixed-entanglement counterparts. By adjusting intermediate states and optimizing interferometer schemes, we improve photon number cost efficiency of GHZ-like states generation. Our findings indicate that while not a universal solution, non-maximally entangled states offer practical advantages for specific photonic quantum information tasks.

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