Year: 2020
Type: article
Abstract: So far, superconducting quantum computers have certain constraints on qubit connectivity, such as nearest-neighbor couplings. To overcome this limitation, we propose a scalable architecture to simultaneously connect several pairs of distant qubits via a dispersively coupled quantum bus. The building block of the bus is composed of orthogonal coplanar waveguide resonators connected through ancillary flux qubits working in the ultrastrong coupling regime. This regime activates virtual processes that boost the effective qubit–qubit interaction, which results in quantum gates on the nanosecond timescale. The interaction is switchable and preserves the coherence of the qubits.
Source: npj Quantum Information
Authors: Roberto Stassi, Mauro Cirio, Franco Nori
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,490
Funders: Silicon Valley Community Foundation, Foundational Questions Institute, Russian Foundation for Basic Research, Japan Society for the Promotion of Science, Japan Science and Technology Agency, National Safety Academic Fund, Core Research for Evolutional Science and Technology, Army Research Office
OpenAlex ID: W3047472059