Quantum Pattern Retrieval by Qubit Networks with Hebb Interactions

Details Quantum Pattern Retrieval by Qubit Networks with Hebb Interactions Quantum Pattern Retrieval by Qubit Networks with Hebb Interactions

2006-09-15

arxiv.org/abs/quant-ph/0609117v1

Physics

Quantum Physics

To appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.97.130503

Qubit networks with long-range interactions inspired by the Hebb rule can be used as quantum associative memories. Starting from a uniform superposition, the unitary evolution generated by these interactions drives the network through a quantum phase transition at a critical computation time, after which ferromagnetic order guarantees that a measurement retrieves the stored memory. The maximum memory capacity p of these qubit networks is reached at a memory density p/n=1.

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