High Fidelity Quantum Logic Operations with Parametrically Coupled Transmon Devices
Abstract
The study of quantum logic operations with superconducting circuits has traditionally focused on a limited range of two-qubit interactions: direct capacitive or inductive coupling, low-frequency tunable coupling, or resonator-based coupling. This project will theoretically study high-frequency tunable coupling via parametric driving of a nonlinear element coupling multiple qubits, such as transmon devices. These methods will be open up a new route to scalable quantum logic operations and have the potential to achieve high-speed, high-fidelity multi? qubit interactions. This project will start with a first-principles modeling of the parametrically coupled transmon circuits and its representation as a controllable multi-level quantum mechanical system. We will perform a systematic analysis of the error mechanisms or operators that emerge due to control noise and dissipation, and compare with simplified models in different coupling regimes. The process fidelity of single-, two-, and multi-qubit operations will be analyzed for these errors and coupling regimes. Special attention will be made to compare the parametric operations with traditional coupling methods. The results of this work will provide a modeling framework to analyze quantum logic using these parametric devices, a set of experimental predictions to be tested in the laboratory, and a route to high fidelity operations and quantum computing with parametric coupled transmon circuits.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 11, 2018
- Source ID
- W911NF1810056
Entities
People
- Frederick Strauch
Organizations
- Army Contracting Command
- National Security Agency
- Williams College