Macroscopic Coherence Explained

Coherence is a general property of a system whereby the components of that system all act in a similar manner. Coherent light is what makes lasers what they are – an alignment of photons, or waveform phases (why cats chase them is a little harder to explain). Superconductivity, a property of zero resistance to electrical flow that was formerly only observed at temperatures near absolute zero, is closely related in that the atoms of the superconducting material are aligned coherently. Quantum entanglement is an example of perfect coherence between two or more particles, in that they act as a single particle no matter how far away from each other you take them. Einstein famously referred to this property as “spooky action at a distance.” The Bose-Einstein condensate is another state of matter that exists at extremely low temperatures and involves a system of particles that have all achieved the […] Read More