2014/05/22 by K. Inomata, K. Koshino, Kazuki Koshino +9 · 2 citations
Computer Science · Physics and Astronomy · #Microwave #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum computer #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Waveguide #cond-mat.supr-con #physics.atom-ph #quant-ph
paper · pdf · doi:10.1103/physrevlett.113.063604
published as Physical Review Letters 113, 063604 (2014) · 10 pages, 8 figures
arxiv created 2014/05/22 · openalex publication_date 2014/08/08 · arxiv updated 2014/09/02 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
By driving a dispersively coupled qubit-resonator system, we realize an "impedance-matched" Λ system that has two identical radiative decay rates from the top level and interacts with a semi-infinite waveguide. It has been predicted that a photon input from the waveguide deterministically induces a Raman transition in the system and switches its electronic state. We confirm this through microwave response to a continuous probe field, observing near-perfect (99.7%) extinction of the reflection and highly efficient (74%) frequency down-conversion. These proof-of-principle results lead to deterministic quantum gates between material qubits and microwave photons and open the possibility for scalable quantum networks interconnected with waveguide photons.