Algorithms & Applications
30.08.21Quantum simulation of dihedral gauge theories
We describe the simulation of dihedral gauge theories on digital quantum computers.
Research Publications Archive
The latest in Quantum Thinking
Entanglement across separate silicon dies in a modular superconducting qubit device
We demonstrate a modular solid state architecture with deterministic inter-module coupling between four physically separate, interchangeable superconducting qubit integrated circuits.
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30.08.21Quantum simulation of Φ⁴ theories in qudit systems
We discuss the implementation of quantum algorithms for lattice Φ⁴ theory on circuit quantum electrodynamics (cQED) system.
Systems R&D
27.08.21Parametric-resonance entangling gates with a tunable coupler
We realize a parametric-resonance gate, which is activated by bringing the average frequency of the modulated qubit in resonance with a static-frequency qubit while approximately retaining the bare qubit-qubit coupling.
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23.08.21Discovery of Nb hydride precipitates in superconducting qubits
We report the first evidence of the formation of niobium hydrides within niobium films on silicon substrates in superconducting qubits fabricated at Rigetti Computing.
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03.08.21Realization of arbitrary doubly-controlled quantum phase gates
We introduce a high-fidelity gate set inspired by a proposal for near-term quantum advantage in optimization problems.
Systems R&D
25.06.21Floating tunable coupler for scalable quantum computing architectures
We propose a floating tunable coupler that does not rely on direct qubit-qubit coupling capacitances to achieve the zero-coupling condition.
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04.05.21Practical verification of quantum properties in quantum approximate optimization runs
We introduce a practical method to verify key non-classical properties of a quantum algorithm’s implementation on a physical device.
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26.03.21Optimizing the optimizer: Decomposition techniques for quantum annealing
We explore multiple heterogeneous approaches to solving multiple industry-relevant benchmark problems in order to understand how best to leverage quantum computers given current constraints.
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25.01.21Methods for accelerating geospatial data processing using quantum computers
We describe an approach to satellite image classification using a universal quantum enhancement to convolutional neural networks: the quanvolutional neural network.
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14.01.21Optically-heralded entanglement of superconducting systems in quantum networks
We propose optical networking via heralding end-to-end entanglement with one detected photon and teleportation.
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15.12.20Quantum versus classical generative modelling in finance
We use a real world financial dataset consisting of correlated currency pairs and compare two models in their ability to learn the resulting distribution - a restricted Boltzmann machine, and a quantum circuit Born machine.
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25.11.20Matchgate benchmarking: Scalable benchmarking of a continuous family of many-qubit gates
We propose a method to reliably and efficiently extract the fidelity of many-qubit quantum circuits composed of continuously parametrized two-qubit gates called matchgates.
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