The light interacts with the cavity and makes an arbitrary number of bounces before leaking out. This emergent light is traditionally treated as heat in quantum simulations. However, it can still be ...

Entropy, introduced by Rudolf Clausius in 1865, is a way to quantify the amount of energy dispersion within a system. It reflects how energy, whether thermal or chemical, becomes more scattered ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." A new paper suggests that time can actually flow forward and backward. Microscopic systems can ...

FROM time to time controversies have appeared in various journals regarding that most difficult of all physical conceptions—entropy. I have purposely avoided passing any opinions as to the merits of ...

Two clashing ideas about disorder inside black holes now point to the same strange conclusions, and it could reshape the ...

MR. SWINBURNE has directed attention to an obscure point in my letter of November 10 which is calculated to produce quite the contrary impression to what I intended. In defining available energy ...