Jerry M. Chow
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View article: Demonstration of quantum volume 64 on a superconducting quantum computing system
Demonstration of quantum volume 64 on a superconducting quantum computing system Open
We improve the quality of quantum circuits on superconducting quantum\ncomputing systems, as measured by the quantum volume, with a combination of\ndynamical decoupling, compiler optimizations, shorter two-qubit gates, and\nexcited state p…
View article: Programming physical quantum systems with pulse-level control
Programming physical quantum systems with pulse-level control Open
Quantum information processing holds great potential for pushing beyond the current frontiers in computing. Specifically, quantum computation promises to accelerate the solving of certain problems, and there are many opportunities for inno…
View article: High-performance superconducting quantum processors via laser annealing of transmon qubits
High-performance superconducting quantum processors via laser annealing of transmon qubits Open
Scaling the number of qubits while maintaining high-fidelity quantum gates remains a key challenge for quantum computing. Presently, superconducting quantum processors with >50 qubits are actively available. For these systems, fixed-freque…
View article: Summary: Chicago Quantum Exchange (CQE) Pulse-level Quantum Control Workshop
Summary: Chicago Quantum Exchange (CQE) Pulse-level Quantum Control Workshop Open
Quantum information processing holds great promise for pushing beyond the current frontiers in computing. Specifically, quantum computation promises to accelerate the solving of certain problems, and there are many opportunities for innova…
View article: Exploiting Dynamic Quantum Circuits in a Quantum Algorithm with Superconducting Qubits
Exploiting Dynamic Quantum Circuits in a Quantum Algorithm with Superconducting Qubits Open
The execution of quantum circuits on real systems has largely been limited to those which are simply time-ordered sequences of unitary operations followed by a projective measurement. As hardware platforms for quantum computing continue to…
View article: Quantum intranet
Quantum intranet Open
Classical computers just won't cut it when it comes to tackling the greatest challenges in biology and medicine. Even accurately simulating the relatively simple caffeine molecule, far simpler than DNA or even proteins, would take an impos…
View article: Demonstration of quantum volume 64 on a superconducting quantum computing system
Demonstration of quantum volume 64 on a superconducting quantum computing system Open
We improve the quality of quantum circuits on superconducting quantum computing systems, as measured by the quantum volume (QV), with a combination of dynamical decoupling, compiler optimizations, shorter two-qubit gates, and excited state…
View article: Exploiting dynamic quantum circuits in a quantum algorithm with superconducting qubits
Exploiting dynamic quantum circuits in a quantum algorithm with superconducting qubits Open
The execution of quantum circuits on real systems has largely been limited to those which are simply time-ordered sequences of unitary operations followed by a projective measurement. As hardware platforms for quantum computing continue to…
View article: High-fidelity superconducting quantum processors via laser-annealing of transmon qubits
High-fidelity superconducting quantum processors via laser-annealing of transmon qubits Open
Scaling the number of qubits while maintaining high-fidelity quantum gates remains a key challenge for quantum computing. Presently, superconducting quantum processors with >50-qubits are actively available. For such systems, fixed-frequen…
View article: High-fidelity superconducting quantum processors via laser-annealing of\n transmon qubits
High-fidelity superconducting quantum processors via laser-annealing of\n transmon qubits Open
Scaling the number of qubits while maintaining high-fidelity quantum gates\nremains a key challenge for quantum computing. Presently, superconducting\nquantum processors with >50-qubits are actively available. For such systems,\nfixed-freq…
View article: Correlated Randomized Benchmarking
Correlated Randomized Benchmarking Open
To improve the performance of multi-qubit algorithms on quantum devices it is critical to have methods for characterizing non-local quantum errors such as crosstalk. To address this issue, we propose and test an extension to the analysis o…
View article: Cross-resonance interactions between superconducting qubits with variable detuning
Cross-resonance interactions between superconducting qubits with variable detuning Open
Cross-resonance interactions are a promising way to implement all-microwave two-qubit gates with fixed-frequency qubits. In this work, we study the dependence of the cross-resonance interaction rate on qubit-qubit detuning and compare with…
View article: Three-Qubit Randomized Benchmarking
Three-Qubit Randomized Benchmarking Open
As quantum circuits increase in size, it is critical to establish scalable multiqubit fidelity metrics. Here we investigate, for the first time, three-qubit randomized benchmarking (RB) on a quantum device consisting of three fixed-frequen…
View article: Supervised learning with quantum-enhanced feature spaces
Supervised learning with quantum-enhanced feature spaces Open
View article: Error mitigation extends the computational reach of a noisy quantum processor
Error mitigation extends the computational reach of a noisy quantum processor Open
View article: Qiskit: An Open-source Framework for Quantum Computing
Qiskit: An Open-source Framework for Quantum Computing Open
Qiskit is an open-source framework for working with noisy quantum computers at the level of pulses, circuits, and algorithms. https://qiskit.org
View article: Qiskit Backend Specifications for OpenQASM and OpenPulse Experiments
Qiskit Backend Specifications for OpenQASM and OpenPulse Experiments Open
As interest in quantum computing grows, there is a pressing need for standardized API's so that algorithm designers, circuit designers, and physicists can be provided a common reference frame for designing, executing, and optimizing experi…
View article: Extending the computational reach of a noisy superconducting quantum processor
Extending the computational reach of a noisy superconducting quantum processor Open
Quantum computation, a completely different paradigm of computing, benefits from theoretically proven speed-ups for certain problems and opens up the possibility of exactly studying the properties of quantum systems. Yet, because of the in…
View article: Multi-path interferometric Josephson directional amplifier for qubit readout
Multi-path interferometric Josephson directional amplifier for qubit readout Open
We realize and characterize a quantum-limited, directional Josephson amplifier suitable for qubit readout. The device consists of two nondegenerate, three-wave-mixing amplifiers that are coupled together in an interferometric scheme, embed…
View article: Experimental Demonstration of Fault-Tolerant State Preparation with Superconducting Qubits
Experimental Demonstration of Fault-Tolerant State Preparation with Superconducting Qubits Open
Robust quantum computation requires encoding delicate quantum information into degrees of freedom that are hard for the environment to change. Quantum encodings have been demonstrated in many physical systems by observing and correcting st…
View article: Multi-Path Interferometric Josephson Directional Amplifier for Qubit\n Readout
Multi-Path Interferometric Josephson Directional Amplifier for Qubit\n Readout Open
We realize and characterize a quantum-limited, directional Josephson\namplifier suitable for qubit readout. The device consists of two nondegenerate,\nthree-wave-mixing amplifiers that are coupled together in an interferometric\nscheme, em…
View article: Gyrator Operation Using Josephson Mixers
Gyrator Operation Using Josephson Mixers Open
Nonreciprocal microwave devices, such as circulators, are useful in routing\nquantum signals in quantum networks and protecting quantum systems against\nnoise coming from the detection chain. However, commercial, cryogenic\ncirculators, no…
View article: Hardware-efficient variational quantum eigensolver for small molecules and quantum magnets
Hardware-efficient variational quantum eigensolver for small molecules and quantum magnets Open
View article: Efficient <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Z</mml:mi></mml:math> gates for quantum computing
Efficient gates for quantum computing Open
For superconducting qubits, microwave pulses drive rotations around the Bloch\nsphere. The phase of these drives can be used to generate zero-duration\narbitrary "virtual" Z-gates which, combined with two $X_{\\pi/2}$ gates, can\ngenerate …
View article: Fast, high-fidelity readout of multiple qubits
Fast, high-fidelity readout of multiple qubits Open
Quantum computing requires a delicate balance between coupling quantum systems to external instruments for control and readout, while providing enough isolation from sources of decoherence. Circuit quantum electrodynamics has been a succes…
View article: Hardware-efficient Quantum Optimizer for Small Molecules and Quantum Magnets
Hardware-efficient Quantum Optimizer for Small Molecules and Quantum Magnets Open
Quantum computers can be used to address molecular structure, materials science and condensed matter physics problems, which currently stretch the limits of existing high-performance computing resources. Finding exact numerical solutions t…
View article: Demonstrating a gyrator operation using Josephson mixers
Demonstrating a gyrator operation using Josephson mixers Open
View article: Dataset of experimental measurements for "Demonstration of quantum advantage in machine learning"
Dataset of experimental measurements for "Demonstration of quantum advantage in machine learning" Open
Dataset of experimental measurements for "Demonstration of quantum advantage in machine learning", npj Quantum Information 3, Article number: 16 (2017).
View article: Building logical qubits in a superconducting quantum computing system
Building logical qubits in a superconducting quantum computing system Open
The technological world is in the midst of a quantum computing and quantum information revolution. Since Richard Feynman’s famous ‘plenty of room at the bottom’ lecture (Feynman, Engineering and Science 23 , 22 (1960)), hinting at the noti…
View article: Experimental Demonstration of a Resonator-Induced Phase Gate in a Multiqubit Circuit-QED System
Experimental Demonstration of a Resonator-Induced Phase Gate in a Multiqubit Circuit-QED System Open
The resonator-induced phase (RIP) gate is an all-microwave multiqubit entangling gate that allows a high degree of flexibility in qubit frequencies, making it attractive for quantum operations in large-scale architectures. We experimentall…