Interactions between light and matter play an instrumental role in spectroscopy, sensing,
quantum information processing and lasers. In most of these applications, light is considered …

Squeezed vacuum state of light is an important concept of quantum optics which has an
uncertainty reduction in a specific quadrature compared to the coherent vacuum state. The …

Photonic time crystals are artificial materials whose electromagnetic properties are uniform
in space but periodically vary in time. The synthesis of these materials and experimental …

Phonon lasers, which exploit coherent amplifications of phonons, are a means to explore
nonlinear phononics, image nanomaterial structures and operate phononic devices …

Matter transport is a fundamental process in nature. Understanding and manipulating flow in
a synthetic media often have rich implications for modern device design. Here we …

The orbital degrees of freedom play a pivotal role in understanding fundamental
phenomena in solid-state materials as well as exotic quantum states of matter including …

Statistical mechanics demands that the temperature of a system is positive provided that its
internal energy has no upper bound. Yet if this condition is not met, it is possible to attain …

Topological insulators are a concept that originally stems from condensed matter physics. As
a corollary to their hallmark protected edge transport, the conventional understanding of …

Non-Hermitian systems have attracted much interest in recent decades, driven partly by the
existence of exotic spectral singularities, known as exceptional points (EPs), where the …

The concept of synthetic dimensions in photonics has attracted rapidly growing interest in
the past few years. Among a variety of photonic systems, the ring resonator system under …