Accession Number : AD1011364

Title :   Entanglement in a Quantum Annealing Processor

Descriptive Note : Journal Article

Corporate Author : D-Wave Systems Inc. Burnaby Canada

Personal Author(s) : Lanting,T ; Przybysz,A J ; Smirnov,A Y ; Spedalieri,F M ; Amin,M H ; Berkley,A J ; Harris,R ; Altomare,F ; Boixo,S ; Bunyk,P ; Dickson,N ; Enderud,C ; Hilton,J P ; Hoskinson,E ; Johnson,M W ; Ladizinsky,E ; Ladizinsky,N ; Neufeld,R ; Oh,T ; Perminov,I ; Rich,C ; Thom,M C ; Tolkacheva,E ; Uchaikin,S ; Wilson,A B ; Rose,G

Full Text :

Report Date : 07 Sep 2016

Pagination or Media Count : 14

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 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 large scale quantum computing.

Descriptors :   quantum computing , quantum information science , quantum properties , QUANTUM BITS , Annealing , algorithms , energy gaps , ground state , spectra , probability , spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE