Quantum networks with time-delays and high-impedance transmission lines

Project funded by Swedish Research Council (Project grant), grant 2021-04037_VR. Participating organisations named by the source: Chalmers University of Technology. Funded amount: SEK 3,300,000, as stated by the source. Runs 2022-01-01 to 2025-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Atom- och molekylfysik och optik, Atom and Molecular Physics and Optics. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-12-05); national funding data, not CORDIS. Abstract given by the source: This proposal concerns the theoretical analysis of superconducting quantum networks consisting of one-dimensional waveguides for microwave photons or phonons, interacting with one or more superconducting artificial atoms. In this field of Waveguide Quantum Electrodynamics (WQED), we want to analyze the situation with many excitations and finite time-delays, using a newly developed formalism based on matrix product states. In addition, we want to extend the analysis of superconducting artificial atoms coupled to high impedance transmission lines, which have recently become experimentally accessible. The speed of light in these transmission lines can be more than two orders of magnitude slower than in vacuum, which implies that time delays become important for smaller systems.High impedance transmission lines enable coupling the artificial atom so strongly that its lifetime approaches its oscillation period. In this regime, matrix product states are also useful to analyze the dynamics.The main driving force behind this project is curiosity. It is however not impossible that the insights from this project can have impact on future versions of architectures for superconducting quantum information processors. At the moment, they do not include high-impedance transmission lines, nor delay lines, but we aim at understanding whether this could be advantageous in the future, since there are novel schemes for photonic quantum computation relying on coherent time delays.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. Retrieved 2026-10-22. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The project "Quantum networks with time-delays and high-impedance transmission lines" is funded by the Swedish Research Council with SEK 3,300,000, running from January 1, 2022, to December 31, 2025, at Chalmers University of Technology. Suggested technology pillar: communication. Generated by AI from the public source text; it may contain errors and the original source is authoritative.