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PreprintarXiv licencearXiv

Associative Memory for Quantum Entangled States

Abstract

We generalize the canonical Hopfield model of associative memory, which stores classical states of individual spins, to store entangled quantum states. The construction is based on truncated projector-sum Hamiltonian, and we explicitly consider a special case that stores dimer singlet coverings of a spin-1/2 system. We analyze the stability of the stored memories and find that the capacity -- the number of stable patterns -- scales faster with the system size than one would expect from a naive analogy with the standard Hopfield model, suggesting a possible quantum advantage.

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BibTeX
@misc{hu2026associative,
  title = {{Associative Memory for Quantum Entangled States}},
  author = {Qiyuan Hu and Kartiek Agarwal and Ivar Martin},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.28726},
  eprint = {2609.28726},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.28726},
}
RIS
TY  - UNPB
TI  - Associative Memory for Quantum Entangled States
AU  - Qiyuan Hu
AU  - Kartiek Agarwal
AU  - Ivar Martin
PY  - 2026
DA  - 2026/09/23
PB  - arXiv
DO  - 10.48550/arxiv.2609.28726
UR  - https://arxiv.org/abs/2609.28726
AB  - We generalize the canonical Hopfield model of associative memory, which stores classical states of individual spins, to store entangled quantum states. The construction is based on truncated projector-sum Hamiltonian, and we explicitly consider a special case that stores dimer singlet coverings of a spin-1/2 system. We analyze the stability of the stored memories and find that the capacity -- the number of stable patterns -- scales faster with the system size than one would expect from a naive analogy with the standard Hopfield model, suggesting a possible quantum advantage.
ER  -