831 citations · 2.8k across the 24 of their papers we have counts for
24 papers
Design and execution of quantum circuits using tens of superconducting qubits and thousands of gates for dense Ising optimization problems
Filip B. Maciejewski, Stuart Hadfield, Benjamin Hall +13
We develop a hardware-efficient ansatz for variational optimization, derived from existing ansatze in the literature, that parametrizes subsets of all interactions in the Cost Hami…
Quantum-Enhanced Greedy Combinatorial Optimization Solver
Maxime Dupont, Bram Evert, Mark J. Hodson +13
Combinatorial optimization is a broadly attractive area for potential quantum advantage, but no quantum algorithm has yet made the leap. Noise in quantum hardware remains a challen…
Towards solving the Fermi-Hubbard model via tailored quantum annealers
Ryan Levy, Zoe Gonzalez Izquierdo, Zhihui Wang +8
The Fermi-Hubbard model (FHM) on a two dimensional square lattice has long been an important testbed and target for simulating fermionic Hamiltonians on quantum hardware. We presen…
Advantage of pausing: parameter setting for quantum annealers
Zoe Gonzalez Izquierdo, Shon Grabbe, Husni Idris +3
Prior work showed the efficacy of pausing midanneal: such a pause improved the probability of success by orders of magnitude in a class of native problem instances and improved the…
Logical shadow tomography: Efficient estimation of error-mitigated observables
Hong-Ye Hu, Ryan LaRose, Yi-Zhuang You +2
We introduce a technique to estimate error-mitigated expectation values on noisy quantum computers. Our technique performs shadow tomography on a logical state to produce a memory-…
Dual Map Framework for Noise Characterization of Quantum Computers
James Sud, Jeffrey Marshall, Zhihui Wang +2
In order to understand the capabilities and limitations of quantum computers, it is necessary to develop methods that efficiently characterize and benchmark error channels present…
Practical Verification of Quantum Properties in Quantum Approximate Optimization Runs
M. Sohaib Alam, Filip A. Wudarski, Matthew J. Reagor +7
In order to assess whether quantum resources can provide an advantage over classical computation, it is necessary to characterize and benchmark the non-classical properties of quan…
Rapid production of defect-free beryllium ion Coulomb crystals
Qiming Wu, Melina Filzinger, Yue Shi +2
Trapped atomic ions find wide applications ranging from precision measurement to quantum information science and quantum computing. Among the different atomic species employed, ber…
Quantum algorithms with local particle number conservation: noise effects and error correction
Michael Streif, Martin Leib, Filip Wudarski +2
Quantum circuits with local particle number conservation (LPNC) restrict the quantum computation to a subspace of the Hilbert space of the qubit register. In a noiseless or fault-t…
Character randomized benchmarking for non-multiplicity-free groups with applications to subspace, leakage, and matchgate randomized benchmarking
Jahan Claes, Eleanor Rieffel, Zhihui Wang
Randomized benchmarking (RB) is a powerful method for determining the error rate of experimental quantum gates. Traditional RB, however, is restricted to gatesets, such as the Clif…
Ferromagnetically shifting the power of pausing
Zoe Gonzalez Izquierdo, Shon Grabbe, Stuart Hadfield +3
We study the interplay between quantum annealing parameters in embedded problems, providing both deeper insights into the physics of these devices and pragmatic recommendations to…
Planning for Compilation of a Quantum Algorithm for Graph Coloring
Minh Do, Zhihui Wang, Bryan O'Gorman +3
The problem of compiling general quantum algorithms for implementation on near-term quantum processors has been introduced to the AI community. Previous work demonstrated that temp…
From Ansätze to Z-gates: a NASA View of Quantum Computing
Eleanor G. Rieffel, Stuart Hadfield, Tad Hogg +12
For the last few years, the NASA Quantum Artificial Intelligence Laboratory (QuAIL) has been performing research to assess the potential impact of quantum computers on challenging…
-mixers: analytical and numerical results for QAOA
Zhihui Wang, Nicholas C. Rubin, Jason M. Dominy +1
The Quantum Alternating Operator Ansatz (QAOA) is a promising gate-model meta-heuristic for combinatorial optimization. Applying the algorithm to problems with constraints presents…
From the Quantum Approximate Optimization Algorithm to a Quantum Alternating Operator Ansatz
Stuart Hadfield, Zhihui Wang, Bryan O'Gorman +3
The next few years will be exciting as prototype universal quantum processors emerge, enabling implementation of a wider variety of algorithms. Of particular interest are quantum h…
Measurement of complete and continuous Wigner functions for discrete atomic systems
Yali Tian, Zhihui Wang, Pengfei Zhang +3
We measure complete and continuous Wigner functions of a two-level cesium atom in both a nearly pure state and highly mixed states. We apply the method [T. Tilma et al., Phys. Rev.…
Quantum Approximate Optimization Algorithm for MaxCut: A Fermionic View
Zhihui Wang, Stuart Hadfield, Zhang Jiang +1
Farhi et al. recently proposed a class of quantum algorithms, the Quantum Approximate Optimization Algorithm (QAOA), for approximately solving combinatorial optimization problems.…
A NASA Perspective on Quantum Computing: Opportunities and Challenges
Rupak Biswas, Zhang Jiang, Kostya Kechezhi +10
In the last couple of decades, the world has seen several stunning instances of quantum algorithms that provably outperform the best classical algorithms. For most problems, howeve…
Near-optimal quantum circuit for Grover's unstructured search using a transverse field
Zhang Jiang, Eleanor G. Rieffel, Zhihui Wang
Inspired by a class of algorithms proposed by Farhi et al. (arXiv:1411.4028), namely the quantum approximate optimization algorithm (QAOA), we present a circuit-based quantum algor…
Loss-based Experimental Test of Bohr's Complementarity Principle with Single Neutral Atom
Zhihui Wang, Yali Tian, Chen Yang +3
An experimental test of quantum complementarity principle based on single neutral atom trapped in a blue detuned bottle trap was here performed. A Ramsey interferometer was used to…
Optimizing a Dynamical Decoupling Protocol for Solid-State Electronic Spin Ensembles in Diamond
Demitry Farfurnik, Andrey Jarmola, Linh M. Pham +5
We demonstrate significant improvements of the spin coherence time of a dense ensemble of nitrogen-vacancy (NV) centers in diamond through optimized dynamical decoupling (DD). Cool…
Comment on: "Classical signature of quantum annealing"
Lei Wang, Troels F. Rønnow, Sergio Boixo +6
In a recent preprint (arXiv:1305.4904) entitled "Classical signature of quantum annealing" Smolin and Smith point out that a bimodal distribution presented in (arXiv:1304.4595) for…
Quantum annealing with more than one hundred qubits
Sergio Boixo, Troels F. Rønnow, Sergei V. Isakov +5
Quantum technology is maturing to the point where quantum devices, such as quantum communication systems, quantum random number generators and quantum simulators, may be built with…
Phenomenology of a lepton triplet
Antonio Delgado, Camilo Garcia Cely, Tao Han +1
The most general phenomenological model involving a lepton triplet with hypercharge is constructed. A distinctive feature of this model is the prediction of a doubly charge…