Quantum-mechanical effects at the macroscopic level were first explored in Josephson-
junction-based superconducting circuits in the 1980s. In recent decades, the emergence of …

In the past 20 years, impressive progress has been made both experimentally and
theoretically in superconducting quantum circuits, which provide a platform for manipulating …

Superconducting circuits based on Josephson junctions exhibit macroscopic quantum
coherence and can behave like artificial atoms. Recent technological advances have made …

An atom in open space can be detected by means of resonant absorption and reemission of
electromagnetic waves, known as resonance fluorescence, which is a fundamental …

The ability to generate particles from the quantum vacuum is one of the most profound
consequences of Heisenberg's uncertainty principle. Although the significance of vacuum …

The high water storage capacity of minerals in Earth's mantle transition zone (410-to 660-
kilometer depth) implies the possibility of a deep H2O reservoir, which could cause …

The coherent interaction between quantum emitters and photonic modes in cavities
underlies many of the current strategies aiming at generating and controlling photonic …

Cavity quantum electrodynamics, which explores the granularity of light by coupling a
resonator to a nonlinear emitter, has played a foundational role in the development of …

We present experimental observation of electromagnetically induced transparency (EIT) on
a single macroscopic artificial “atom”(superconducting quantum system) coupled to open 1D …

Quantum mechanics ascribes to the ground state of the electromagnetic radiation zero-point
electric field fluctuations that permeate empty space at all frequencies. No energy can be …