Efficient Assessment of Process Fidelity
arXiv:2102.08101 · doi:10.1103/PhysRevResearch.3.033031
Abstract
The accurate implementation of quantum gates is essential for the realisation of quantum algorithms and digital quantum simulations. This accuracy may be increased on noisy hardware through the variational optimisation of gates, however the experimental realisation of such a protocol is impeded by the large effort required to estimate the fidelity of an implemented gate. With a hierarchy of approximations we find a faithful approximation to the quantum process fidelity that can be estimated experimentally with reduced effort. Its practical use is demonstrated with the optimisation of a three-qubit quantum gate on a commercially available quantum processor.
arXiv comment13 pages, 9 figures
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- Optimal control of families of quantum gates
- Cross-Platform Comparison of Arbitrary Quantum Processes
- Variational Quantum Gate Optimization at the Pulse Level
- Quantum control without quantum states
- Unitary Transformations using Robust Optimal Control on a Cold Atom Qudit
- Phonon-mediated quantum gates in trapped ions coupled to an ultracold atomic gas
- Automated Synthesis of Quantum Algorithms via Classical Numerical Techniques
- Active Learning for Quantum Mechanical Measurements