404 citations · 2.9k across the 40 of their papers we have counts for
15 papers · 1 filter
Distributed fault-tolerant quantum memories over a 2xL array of qubit modules
Edwin Tham, Min Ye, Ilia Khait +2
We propose an architecture for a quantum memory distributed over a array of modules equipped with a cyclic shift implemented via flying qubits. The logical information…
Benchmarking a trapped-ion quantum computer with 30 qubits
Jwo-Sy Chen, Erik Nielsen, Matthew Ebert +8
Quantum computers are rapidly becoming more capable, with dramatic increases in both qubit count and quality. Among different hardware approaches, trapped-ion quantum processors ar…
Gate Set Tomography
Erik Nielsen, John King Gamble, Kenneth Rudinger +3
Gate set tomography (GST) is a protocol for detailed, predictive characterization of logic operations (gates) on quantum computing processors. Early versions of GST emerged around…
Operational, gauge-free quantum tomography
Olivia Di Matteo, John Gamble, Chris Granade +2
As increasingly impressive quantum information processors are realized in laboratories around the world, robust and reliable characterization of these devices is now more urgent th…
Bayesian ACRONYM Tuning
John Gamble, Chris Granade, Nathan Wiebe
We provide an algorithm that uses Bayesian randomized benchmarking in concert with a local optimizer, such as SPSA, to find a set of controls that optimizes that average gate fidel…
Demonstration of qubit operations below a rigorous fault tolerance threshold with gate set tomography
Robin Blume-Kohout, John King Gamble, Erik Nielsen +4
Quantum information processors promise fast algorithms for problems inaccessible to classical computers. But since qubits are noisy and error-prone, they will depend on fault-toler…
Robust, self-consistent, closed-form tomography of quantum logic gates on a trapped ion qubit
Robin Blume-Kohout, John King Gamble, Erik Nielsen +3
We introduce and demonstrate experimentally: (1) a framework called "gate set tomography" (GST) for self-consistently characterizing an entire set of quantum logic gates on a black…
Power law scaling for the adiabatic algorithm for search engine ranking
Adam Frees, John King Gamble, Kenneth Rudinger +4
An important method for search engine result ranking works by finding the principal eigenvector of the "Google matrix." Recently, a quantum algorithm for preparing this eigenvector…
Pulse-gated quantum dot hybrid qubit
Teck Seng Koh, John King Gamble, Mark Friesen +2
A quantum dot hybrid qubit formed from three electrons in a double quantum dot has the potential for great speed, due to presence of level crossings where the qubit becomes charge-…
Comparing algorithms for graph isomorphism using discrete- and continuous-time quantum random walks
Kenneth Rudinger, John King Gamble, Eric Bach +3
Berry and Wang [Phys. Rev. A {\bf 83}, 042317 (2011)] show numerically that a discrete-time quantum random walk of two noninteracting particles is able to distinguish some non-isom…
Non-interacting multi-particle quantum random walks applied to the graph isomorphism problem for strongly regular graphs
Kenneth Rudinger, John King Gamble, Mark Wellons +4
We investigate the quantum dynamics of particles on graphs ("quantum random walks"), with the aim of developing quantum algorithms for determining if two graphs are isomorphic (rel…
A fast "hybrid" silicon double quantum dot qubit
Zhan Shi, C. B. Simmons, J. R. Prance +9
We propose a quantum dot qubit architecture that has an attractive combination of speed and fabrication simplicity. It consists of a double quantum dot with one electron in one dot…
Two-particle quantum walks applied to the graph isomorphism problem
John King Gamble, Mark Friesen, Dong Zhou +2
We show that the quantum dynamics of interacting and noninteracting quantum particles are fundamentally different in the context of solving a particular computational problem. Spec…
Direct observation of quantum criticality in Ising spin chains
Jingfu Zhang, Fernando M. Cucchietti, C. M. Chandrashekar +6
We use NMR quantum simulators to study antiferromagnetic Ising spin chains undergoing quantum phase transitions. Taking advantage of the sensitivity of the systems near criticality…
Foundations of Quantum Decoherence
John Gamble
The conventional interpretation of quantum mechanics, though it permits a correspondence to classical physics, leaves the exact mechanism of transition unclear. Though this was onl…