Fluxonium-controlled Modular Multimode Cavity Quantum Processor
Abstract
High-Q superconducting multimode cavities (MMC) are a particularly promising platform for quantum information processing due to their long lifetimes and the minimal hardware overhead associated with using the MMC as a quantum register. One can store multiple qubits in a single MMC while only requiring a single auxiliary mode to manipulate the different qubits. The main challenge in building a quantum information processor using MMCs is the maintenance of the MMCsÕ high performance while introducing the auxiliary modes necessary for cavity manipulation and intercavity communication. We propose to overcome this roadblock by coupling MMCs to long-coherence auxiliary modes such as the fluxonium for manipulation and high-Q network buses for communication. We will leverage recent technological advances in three-wave mixing elements and in the coherence of fluxonium qubits to develop high-Q-compatible parametric gates between cavities. We will also take a modular approach to scaling and mediate communication between cavities via a coaxial cable. The central goal of this project is to develop a prototypical processor comprising two MMC modules. The final product of this development will be the execution of a high-fidelity teleported gate between two remotely connected MMC modules. Our project will serve as a demonstration for how to build a multi-MMC processor without spoiling the intrinsic cavity coherence. The performance and error budget of this experiment will allow us to produce a strategy for scaling the network to a larger size than 2 modules and inform designs for further increasing performance.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 24, 2023
- Source ID
- W911NF2310096
Entities
People
- Wolfgang Pfaff
Organizations
- Army Contracting Command
- National Security Agency
- University of Illinois Urbana–Champaign