Photonic quantum technologies represent a promising platform for several applications,
ranging from long-distance communications to the simulation of complex phenomena …

Classical wave fields are real-valued, ensuring the wave states at opposite frequencies and
momenta to be inherently identical. Such a particle–hole symmetry can open up new …

Spontaneous emission of an excited atom in a featureless continuum of electromagnetic
modes is a fundamental process in quantum electrodynamics associated with an …

We report on the first experimental observation of topological edge states in zigzag chains of
plasmonic nanodisks. We demonstrate that such edge states can be selectively excited with …

The observation of abundant topological properties in optical platforms has attracted
people's attention due to their great advantages in fundamental topological research and …

Transformation optics have been an essential paradigm to manipulate electromagnetic
waves on the subwavelength scale and have brought various functional photonic …

Starting with a product initial state, squeezed (squeezed coherent) state in one of the modes,
and vacuum in the rest, we report that a circular waveguide comprising modes coupled with …

When quantum fields are coupled to gravitational fields, spontaneous particle creation may
occur similarly to when they are coupled to external electromagnetic fields. A gravitational …

A Majorana fermion is the single fermionic particle that is its own antiparticle. Its dynamics is
determined by the Majorana equation, where the spinor field is by definition equal to its …

A quantum simulator is an important device that may soon outperform current classical
computations. A basic arithmetic operation, the complex conjugate, however, is considered …