As 24-cent copies of Albert Einstein’s abstruse “Coherent Field Theory” reached the U. S. last week, the man himself, his wife and a daughter plodded about Wannsee, simply hunting rooms at that lake ...

Field theory and the renormalization group (RG) offer a robust mathematical framework to decipher the complex phenomena emerging in disordered systems. At their core, these approaches model the ...

Perturbative expansion is a valuable mathematical technique which is widely used to break down descriptions of complex quantum systems into simpler, more manageable parts. Perhaps most importantly, it ...