Pulse-efficient circuit transpilation for quantum applications on cross-resonance-based hardware

We show a pulse-efficient circuit transpilation framework for noisy quantum hardware. This is achieved by scaling cross-resonance pulses and exposing each pulse as a gate to remove redundant single-qubit operations with the transpiler. Crucially, no additional calibration is needed to yield better r...

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Main Authors: Nathan Earnest, Caroline Tornow, Daniel J. Egger
Format: Article
Language:English
Published: American Physical Society 2021-10-01
Series:Physical Review Research
Online Access:http://doi.org/10.1103/PhysRevResearch.3.043088
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author Nathan Earnest
Caroline Tornow
Daniel J. Egger
author_facet Nathan Earnest
Caroline Tornow
Daniel J. Egger
author_sort Nathan Earnest
collection DOAJ
description We show a pulse-efficient circuit transpilation framework for noisy quantum hardware. This is achieved by scaling cross-resonance pulses and exposing each pulse as a gate to remove redundant single-qubit operations with the transpiler. Crucially, no additional calibration is needed to yield better results than a CNOT-based transpilation. This pulse-efficient circuit transpilation therefore enables a better usage of the finite coherence time without requiring knowledge of pulse-level details from the user. As demonstration, we realize a continuous family of cross-resonance-based gates for SU(4) by leveraging Cartan's decomposition. We measure the benefits of a pulse-efficient circuit transpilation with process tomography and observe up to a 50% error reduction in the fidelity of R_{ZZ}(θ) and arbitrary SU(4) gates on IBM Quantum devices. We apply this framework for quantum applications by running circuits of the quantum approximate optimization algorithm applied to MAXCUT. For an 11-qubit nonhardware native graph, our methodology reduces the overall schedule duration by up to 52% and errors by up to 38%.
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spelling doaj.art-8a99370052a144b29517fa10ee0344492024-04-12T17:15:16ZengAmerican Physical SocietyPhysical Review Research2643-15642021-10-013404308810.1103/PhysRevResearch.3.043088Pulse-efficient circuit transpilation for quantum applications on cross-resonance-based hardwareNathan EarnestCaroline TornowDaniel J. EggerWe show a pulse-efficient circuit transpilation framework for noisy quantum hardware. This is achieved by scaling cross-resonance pulses and exposing each pulse as a gate to remove redundant single-qubit operations with the transpiler. Crucially, no additional calibration is needed to yield better results than a CNOT-based transpilation. This pulse-efficient circuit transpilation therefore enables a better usage of the finite coherence time without requiring knowledge of pulse-level details from the user. As demonstration, we realize a continuous family of cross-resonance-based gates for SU(4) by leveraging Cartan's decomposition. We measure the benefits of a pulse-efficient circuit transpilation with process tomography and observe up to a 50% error reduction in the fidelity of R_{ZZ}(θ) and arbitrary SU(4) gates on IBM Quantum devices. We apply this framework for quantum applications by running circuits of the quantum approximate optimization algorithm applied to MAXCUT. For an 11-qubit nonhardware native graph, our methodology reduces the overall schedule duration by up to 52% and errors by up to 38%.http://doi.org/10.1103/PhysRevResearch.3.043088
spellingShingle Nathan Earnest
Caroline Tornow
Daniel J. Egger
Pulse-efficient circuit transpilation for quantum applications on cross-resonance-based hardware
Physical Review Research
title Pulse-efficient circuit transpilation for quantum applications on cross-resonance-based hardware
title_full Pulse-efficient circuit transpilation for quantum applications on cross-resonance-based hardware
title_fullStr Pulse-efficient circuit transpilation for quantum applications on cross-resonance-based hardware
title_full_unstemmed Pulse-efficient circuit transpilation for quantum applications on cross-resonance-based hardware
title_short Pulse-efficient circuit transpilation for quantum applications on cross-resonance-based hardware
title_sort pulse efficient circuit transpilation for quantum applications on cross resonance based hardware
url http://doi.org/10.1103/PhysRevResearch.3.043088
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