With the development of photonic quantum technologies, single photons have become key
for various applications including quantum communication and quantum computing …

Metamaterials are artificially engineered materials that exhibit novel properties beyond
natural materials. By carefully designing the subwavelength unit cell structures, unique …

Quantum theory is the foundation of modern physics. Some of its basic principles, such as
Born's rule, however, are based on postulates which require experimental testing. Any …

Single-photon detectors that can resolve photon number play a key role in advanced
quantum information technologies. Despite significant progress in improving conventional …

Metasurfaces have been widely used to manipulate terahertz waves due to their great
potential for achieving unique electromagnetic responses. However, to realize ultrafast and …

Ammonia is a well-known example of a two-state system and must be described in quantum-
mechanical terms. In this article, we will explain the tunneling phenomenon that occurs in …

Within the established theoretical framework of quantum mechanics, interference always
occurs between pairs of paths through an interferometer. Higher order interferences with …

We present two complementary viewpoints for combining quantum computers and the
foundations of quantum mechanics. On the one hand, ideal devices can be used as test …

It is a fundamental prediction of quantum theory that states of physical systems are
described by complex vectors or density operators on a Hilbert space. However, many …

The Feynman path integral formalism has long been used for calculations of probability
amplitudes. Over the last few years, it has been extensively used to theoretically …