Increasing the Measured Effective Quantum Volume with Zero Noise Extrapolation
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- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Unitary Fund, San Francisco, CA (United States)
- Unitary Fund, San Francisco, CA (United States); Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland)
- Unitary Fund, San Francisco, CA (United States); Univ. of Camerino (Italy)
- Unitary Fund, San Francisco, CA (United States); Goldman Sachs and Co, New York, NY (United States)
Quantum volume is a full-stack benchmark for near-term quantum computers. It quantifies the largest size of a square circuit which can be executed on the target device with reasonable fidelity. Error mitigation is a set of techniques intended to remove the effects of noise present in the computation of noisy quantum computers when computing an expectation value of interest. Effective quantum volume is a proposed metric that applies error mitigation to the quantum volume protocol to evaluate the effectiveness not only of the target device but also of the error mitigation algorithm. Digital zero-noise extrapolation is an error mitigation technique that estimates the noiseless expectation value using circuit folding to amplify errors by known scale factors and then extrapolating computed expectation values to the zero-noise limit. Here we demonstrate that zero-noise extrapolation, with global and local unitary folding with fractional scale factors, in conjunction with dynamical decoupling, can increase the effective quantum volume over the vendor-measured quantum volume. Specifically, we measure the effective quantum volume of four IBM Quantum superconducting processor units, obtaining values that are larger than the vendor-measured quantum volume on each device. This is the first such increase reported.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); IBM
- Grant/Contract Number:
- 89233218CNA000001; SC0020266; SC0020316
- OSTI ID:
- 2477790
- Report Number(s):
- LA-UR--23-26260
- Journal Information:
- ACM Transactions on Quantum Computing, Journal Name: ACM Transactions on Quantum Computing Journal Issue: 3 Vol. 5; ISSN 2643-6809
- Publisher:
- Association for Computing MachineryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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