Research Talks
Energy Participation Ratio (EPR) for Superconducting Qubit Design
Presents EPR as a unified way to get both the Hamiltonian and the dissipation budget of a Josephson circuit from a single eigenmode simulation, by asking what fraction of each mode's energy sits in the junction or lossy element. It covers the derivation, sum rules, bright/dark mode intuition, and agreement with experiment across 3D, flip-chip (2.5D) and waveguide devices. Backup slides apply the method to the cross-resonance gate with a direct coupler.
- EPR definition and quantization in the basis of linearized eigenmodes
- Hamiltonian parameters (anharmonicity, cross-Kerr, Lamb shift) and loss EPRs
- Measured vs. predicted results over five orders of magnitude for several architectures
- Cross-resonance gate analysis: ZX rate and spurious terms in the EPR basis
Summary and key points drafted by a language model from the slides, not yet reviewed by me. The slides are the source.
Cite
@misc{minev2019energyparticipation,
author = {Zlatko K. Minev},
title = {{Energy Participation Ratio (EPR) for Superconducting Qubit Design}},
howpublished = {Talk},
year = {2019},
url = {https://zlatko-minev.github.io/zlatko-minev-quantum-repository/items/2019-energy-participation-ratio-epr-for-superconducting/},
note = {Slides}
}Reuse
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