Аннотация
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 eigenspectrum of two- and eight-qubit systems within one such processor, demonstrating quantum coherence in these systems. We present experimental evidence that, during a critical portion of QA, the qubits become entangled and entanglement persists even as these systems reach equilibrium with a thermal environment. Our results provide an encouraging sign that QA is a viable technology for largescale quantum computing.
Язык оригинала | Английский |
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Номер статьи | 021041 |
Журнал | Physical Review X |
Том | 4 |
Номер выпуска | 2 |
DOI | |
Состояние | Опубликовано - 2014 |
ASJC Scopus subject areas
- Physics and Astronomy(all)