Yasunobu Nakamura

TL;DR: This work realizes a PPLO with Josephson-junction circuitry and operates it as a sensitive phase detector, demonstrating the demodulation of a weak binary phase-shift keying microwave signal of the order of a femtowatt and applying it to dispersive readout of a superconducting qubit.

TL;DR: In this article, the authors proposed a gate comprising a superconducting ''atom'' and a microwave photon, in which gate operation is completed (not probabilistically) upon reflection of the photon.

TL;DR: In this article, the authors demonstrate the feasibility of coupling multiple solid-state qubits, and indicate the existence of entangled two-qubit states, and demonstrate a Josephson circuit consisting of two coupled charge qubits.

TL;DR: In this article, a vibrational mode of a SiN x membrane is coupled to a three-dimensional loop-gap superconducting microwave cavity, where the electric field across a mechanically compliant narrow-gap capacitor realizes the quantum strong coupling regime under a red-sideband pump field and the quantum ground state cooling of the mechanical mode.