Specification of photonic circuits using Quantum Hardware Description   Language
  Following the simple observation that the interconnection of a set of quantum optical input-output devices can be specified using structural mode VHSIC Hardware Description Language (VHDL), we demonstrate a computer-aided schematic capture workflow for modeling and simulating multi-component photonic circuits. We describe an algorithm for parsing circuit descriptions to derive quantum equations of motion, illustrate our approach using simple examples based on linear and cavity-nonlinear optical components, and demonstrate a computational approach to hierarchical model reduction. 
Nikolas Tezak, Armand Niederberger, Dmitri S. Pavlichin, Gopal Sarma   and Hideo Mabuchi
quant-ph physics.optics