Matthew N. H. Chow
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View article: Noise-aware circuit compilations for a continuously parameterized two-qubit gateset
Noise-aware circuit compilations for a continuously parameterized two-qubit gateset Open
State-of-the-art noisy-intermediate-scale quantum processors are currently implemented across a variety of hardware platforms, each with their own distinct gatesets. As such, circuit compilation should not only be aware of but also deeply …
View article: Solovay Kitaev and Randomized Compilation
Solovay Kitaev and Randomized Compilation Open
We analyze the use of the Solovay Kitaev (SK) algorithm to generate an ensemble of one qubit rotations over which to perform randomized compilation. We perform simulations to compare the trace distance between the quantum state resulting f…
View article: Realization and Calibration of Continuously Parameterized Two-Qubit Gates on a Trapped-Ion Quantum Processor
Realization and Calibration of Continuously Parameterized Two-Qubit Gates on a Trapped-Ion Quantum Processor Open
Continuously parameterized two-qubit gates are a key feature of state-of-the-art trapped-ion quantum processors, as they have favorable error scalings and show distinct improvements in circuit performance over more restricted maximally ent…
View article: Circuit-Based Leakage-to-Erasure Conversion in a Neutral-Atom Quantum Processor
Circuit-Based Leakage-to-Erasure Conversion in a Neutral-Atom Quantum Processor Open
Atom-loss errors are a major limitation of current state-of-the-art neutral-atom quantum computers and pose a significant challenge for scalable systems. In a quantum processor with cesium atoms, we demonstrate proof-of-principle circuit-b…
View article: Error mitigation, optimization, and extrapolation on a trapped-ion testbed
Error mitigation, optimization, and extrapolation on a trapped-ion testbed Open
Current noisy intermediate-scale quantum (NISQ) trapped-ion devices are subject to errors which can significantly impact the accuracy of calculations if left unchecked. A form of error mitigation called zero noise extrapolation (ZNE) can d…
View article: CMOS-fabricated ultraviolet light modulators using low-loss alumina piezo-optomechanical photonic circuits
CMOS-fabricated ultraviolet light modulators using low-loss alumina piezo-optomechanical photonic circuits Open
Ultra-violet (UV) and near-UV wavelengths are necessary for many important optical transitions for quantum technologies and various sensing mechanisms for biological and chemical detection. However, all well-known photonic platforms have e…
View article: Circuit-based leakage-to-erasure conversion in a neutral atom quantum processor
Circuit-based leakage-to-erasure conversion in a neutral atom quantum processor Open
Leakage out of the computational subspace is a major limitation of current state-of-the-art neutral-atom quantum computers and a significant challenge for scalable systems. In a quantum processor with cesium atoms, we demonstrate proof-of-…
View article: Precise micromotion compensation of a tilted ion chain
Precise micromotion compensation of a tilted ion chain Open
Excess micromotion can be a substantial source of errors in trapped-ion based quantum processors and clocks due to the sensitivity of the internal states of the ion to external fields and motion. This problem can be fixed by compensating b…
View article: Digital Quantum Simulation of Cavity Quantum Electrodynamics: Insights from Superconducting and Trapped Ion Quantum Testbeds
Digital Quantum Simulation of Cavity Quantum Electrodynamics: Insights from Superconducting and Trapped Ion Quantum Testbeds Open
We explore the potential for hybrid development of quantum hardware where currently available quantum computers simulate open Cavity Quantum Electrodynamical (CQED) systems for applications in optical quantum communication, simulation and …
View article: First-order crosstalk mitigation in parallel quantum gates driven with multi-photon transitions
First-order crosstalk mitigation in parallel quantum gates driven with multi-photon transitions Open
We demonstrate an order of magnitude reduction in the sensitivity to optical crosstalk for neighboring trapped-ion qubits during simultaneous single-qubit gates driven with individual addressing beams. Gates are implemented via two-photon …
View article: First-Order Crosstalk Mitigation in Parallel Quantum Gates Driven With Multi-Photon Transitions
First-Order Crosstalk Mitigation in Parallel Quantum Gates Driven With Multi-Photon Transitions Open
We demonstrate an order of magnitude reduction in the sensitivity to optical crosstalk for neighboring trapped-ion qubits during simultaneous single-qubit gates driven with individual addressing beams. Gates are implemented via two-photon …
View article: Error mitigation, optimization, and extrapolation on a trapped ion testbed
Error mitigation, optimization, and extrapolation on a trapped ion testbed Open
Current noisy intermediate-scale quantum (NISQ) trapped-ion devices are subject to errors which can significantly impact the accuracy of calculations if left unchecked. A form of error mitigation called zero noise extrapolation (ZNE) can d…
View article: Characterizing and mitigating coherent errors in a trapped ion quantum processor using hidden inverses
Characterizing and mitigating coherent errors in a trapped ion quantum processor using hidden inverses Open
Quantum computing testbeds exhibit high-fidelity quantum control over small collections of qubits, enabling performance of precise, repeatable operations followed by measurements. Currently, these noisy intermediate-scale devices can suppo…
View article: Sample-efficient verification of continuously-parameterized quantum gates for small quantum processors
Sample-efficient verification of continuously-parameterized quantum gates for small quantum processors Open
Most near-term quantum information processing devices will not be capable of implementing quantum error correction and the associated logical quantum gate set. Instead, quantum circuits will be implemented directly using the physical nativ…
View article: Frequency-robust Mølmer-Sørensen gates via balanced contributions of multiple motional modes
Frequency-robust Mølmer-Sørensen gates via balanced contributions of multiple motional modes Open
In this work, we design and implement frequency-robust Molmer-Sorensen gates on a linear chain of trapped ions, using Gaussian amplitude modulation and a constant laser frequency. We select this frequency to balance the entanglement accumu…
View article: Batching Circuits to Reduce Compilation in Quantum Control Hardware
Batching Circuits to Reduce Compilation in Quantum Control Hardware Open
At Sandia National Laboratories, QSCOUT (the Quantum Scientific Computing Open User Testbed) is an ion-trap based quantum computer built for the purpose of allowing users low-level access to quantum hardware. Commands are executed on the h…
View article: High-Fidelity, Low-Loss State Detection of Alkali-Metal Atoms in Optical Tweezer Traps
High-Fidelity, Low-Loss State Detection of Alkali-Metal Atoms in Optical Tweezer Traps Open
We demonstrate discrimination of ground-state hyperfine manifolds of a cesium atom in an optical tweezer using a simple probe beam with 99.91(2)% detection fidelity and 0.9(2)% detection-driven loss of bright state atoms. Our detection inf…
View article: Characterizing and mitigating coherent errors in a trapped ion quantum processor using hidden inverses
Characterizing and mitigating coherent errors in a trapped ion quantum processor using hidden inverses Open
Quantum computing testbeds exhibit high-fidelity quantum control over small collections of qubits, enabling performance of precise, repeatable operations followed by measurements. Currently, these noisy intermediate-scale devices can suppo…
View article: Sample-efficient verification of continuously-parameterized quantum gates for small quantum processors
Sample-efficient verification of continuously-parameterized quantum gates for small quantum processors Open
Most near-term quantum information processing devices will not be capable of implementing quantum error correction and the associated logical quantum gate set. Instead, quantum circuits will be implemented directly using the physical nativ…
View article: Engineering the Quantum Scientific Computing Open User Testbed (QSCOUT): Design details and user guide
Engineering the Quantum Scientific Computing Open User Testbed (QSCOUT): Design details and user guide Open
The Quantum Scientific Computing Open User Testbed (QSCOUT) at Sandia National Laboratories is a trapped-ion qubit system designed to evaluate the potential of near-term quantum hardware in scientific computing applications for the US Depa…
View article: Engineering the Quantum Scientific Computing Open User Testbed
Engineering the Quantum Scientific Computing Open User Testbed Open
The Quantum Scientific Computing Open User Testbed (QSCOUT) at Sandia\nNational Laboratories is a trapped-ion qubit system designed to evaluate the\npotential of near-term quantum hardware in scientific computing applications\nfor the US D…
View article: Entanglement Enhanced Matterwave Interferometry
Entanglement Enhanced Matterwave Interferometry Open