Quantum particles have a social life, of a sort. They interact and form relationships with each other, and one of the most important features of a quantum particle is whether it is an introvert—a ...

Passive, lossy materials with positive index at real frequencies can be used to realize optical antimatter under complex frequency excitation. Our approach enables arbitrary complex \(\epsilon ,\,\mu\ ...

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...

In 1531 a "Lady from Heaven" appeared to Saint Juan Diego, a poor Indian from Tepeyac, a hill northwest of Mexico City. She identified herself as the Mother of the True God and instructed him to have ...