@article { ISI:000500475200001,
title = {Benchmarking an 11-qubit quantum computer},
journal = {Nat. Commun.},
volume = {10},
year = {2019},
month = {NOV 29},
pages = {5464},
publisher = {NATURE PUBLISHING GROUP},
type = {Article},
abstract = {The field of quantum computing has grown from concept to demonstration devices over the past 20 years. Universal quantum computing offers efficiency in approaching problems of scientific and commercial interest, such as factoring large numbers, searching databases, simulating intractable models from quantum physics, and optimizing complex cost functions. Here, we present an 11-qubit fully-connected, programmable quantum computer in a trapped ion system composed of 13 Yb-171(+) ions. We demonstrate average single-qubit gate fidelities of 99.5\%, average two-qubit-gate fidelities of 97.5\%, and SPAM errors of 0.7\%. To illustrate the capabilities of this universal platform and provide a basis for comparison with similarly-sized devices, we compile the Bernstein-Vazirani and Hidden Shift algorithms into our native gates and execute them on the hardware with average success rates of 78\% and 35\%, respectively. These algorithms serve as excellent benchmarks for any type of quantum hardware, and show that our system outperforms all other currently available hardware.},
issn = {2041-1723},
doi = {10.1038/s41467-019-13534-2},
author = {Wright, K. and Beck, K. M. and Debnath, S. and Amini, J. M. and Nam, Y. and Grzesiak, N. and Chen, J. -S. and Pisenti, N. C. and Chmielewski, M. and Collins, C. and Hudek, K. M. and Mizrahi, J. and Wong-Campos, J. D. and Allen, S. and Apisdorf, J. and Solomon, P. and Williams, M. and Ducore, A. M. and Blinov, A. and Kreikemeier, S. M. and Chaplin, V. and Keesan, M. and Monroe, C. and Kim, J.}
}
@article { ISI:000502778700003,
title = {Toward convergence of effective-field-theory simulations on digital quantum computers},
journal = {Phys. Rev. A},
volume = {100},
number = {6},
year = {2019},
month = {DEC 16},
pages = {062319},
publisher = {AMER PHYSICAL SOC},
type = {Article},
abstract = {We report results for simulating an effective field theory to compute the binding energy of the deuteron nucleus using a hybrid algorithm on a trapped-ion quantum computer. Two increasingly complex unitary coupled-cluster ansatze have been used to compute the binding energy to within a few percent for successively more complex Hamiltonians. By increasing the complexity of the Hamiltonian, allowing more terms in the effective field theory expansion, and calculating their expectation values, we present a benchmark for quantum computers based on their ability to scalably calculate the effective field theory with increasing accuracy. Our result of E-4 = - 2.220 +/- 0.179 MeV may be compared with the exact deuteron ground-state energy -2.224 MeV. We also demonstrate an error mitigation technique using Richardson extrapolation on ion traps. The error mitigation circuit represents a record for deepest quantum circuit on a trapped-ion quantum computer.},
issn = {2469-9926},
doi = {10.1103/PhysRevA.100.062319},
author = {Shehab, O. and Landsman, K. and Nam, Y. and Zhu, D. and Linke, N. M. and Keesan, M. and Pooser, R. C. and Monroe, C.}
}