Electron spin polarization (ESP) refers to the alignment of electron spins in a specified
direction, with burgeoning research underscoring its pivotal role in enhancing rechargeable …

Atomic defects in the solid state are a key component of quantum repeater networks for long-
distance quantum communication. Recently, there has been significant interest in rare earth …

The field of nanoscale magnetic resonance imaging (NanoMRI) was started 30 years ago. It
was motivated by the desire to image single molecules and molecular assemblies, such as …

We report an extensive high-sensitivity search for axion dark matter above 1 GHz at the
Center for Axion and Precision Physics Research (CAPP). The cavity resonant search …

Owing to their strong dipole moment and long coherence times, superconducting qubits
have demonstrated remarkable success in hybrid quantum circuits. However, most qubit …

Josephson junctions are a central element in superconducting quantum technology; in these
devices, irreversibility arises from abrupt slips of the quantum phase difference across the …

When strongly pumped at twice their resonant frequency, nonlinear resonators develop a
high-amplitude intracavity field, a phenomenon known as parametric self-oscillations. The …

Josephson junction parametric amplifiers have become essential tools for microwave
quantum circuit readout with minimal added noise. Even after improving at an impressive …

We demonstrate an efficient and continuous microwave photon-to-electron converter with
large quantum efficiency (83%) and low dark current. These unique properties are enabled …

Single-photon detection played an important role in the development of quantum optics. Its
implementation in the microwave domain is challenging because the photon energy is five …