Entanglement in a Quantum Annealing Processor

@article{Lanting2014EntanglementIA,
  title={Entanglement in a Quantum Annealing Processor},
  author={Trevor Lanting and Anthony J. Przybysz and A. Yu. Smirnov and Federico M. Spedalieri and Mohammad H. S. Amin and Andrew J. Berkley and R. Harris and F Altomare and Sergio Boixo and Paul I. Bunyk and Neil G. Dickson and C Enderud and Jeremy P. Hilton and E. Hoskinson and M. William Johnson and Eric Ladizinsky and Nicolas Ladizinsky and Richard Bryon Neufeld and Travis Oh and I. G. Perminov and Chris Rich and Murray C. Thom and Elena Tolkacheva and Sergey Uchaikin and A. B. Wilson and Geordie Rose},
  journal={Physical Review X},
  year={2014},
  volume={4},
  pages={021041}
}
Abstract : Entanglement lies at the core of quantum algorithms designed to solve problems that are intractable by classical approaches. One such algorithm, quantum annealing (QA), provides a promising path to a practical quantum processor. We have built a series of architecturally scalable QA processors consisting of networks of manufactured interacting spins (qubits). Here, we use qubit tunneling spectroscopy to measure the energy eigen spectrum of two- and eight-qubit systems within one such… 

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