2016/11/21 by Neill Lambert, Yuichiro Matsuzaki, Kosuke Kakuyanagi +3 · 54 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Flux qubit #Physics #Quantum #Quantum Information and Cryptography #Quantum computer #Quantum information #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Statistical physics #Superconducting quantum computing #Superconductivity #Superradiance #quant-ph
paper · pdf · doi:10.1103/physrevb.94.224510
published in Physical review. B./Physical review. B 94(22) (American Physical Society)
arxiv created 2016/11/21 · openalex publication_date 2016/12/15 · arxiv updated 2017/01/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Superconducting flux qubits are a promising candidate for realizing quantum information processing and quantum simulations. Such devices behave like artificial atoms, with the advantage that one can easily tune the ``atoms'' internal properties. Here, by harnessing this flexibility, we propose a technique to minimize the inhomogeneous broadening of a large ensemble of flux qubits by tuning only the external flux. In addition, as an example of many-body physics in such an ensemble, we show how to observe superradiance, and its quadratic scaling with ensemble size, using a tailored microwave control pulse that takes advantage of the inhomogeneous broadening itself to excite only a subensemble of the qubits. Our scheme opens up an approach to using superconducting circuits to explore the properties of quantum many-body systems.