2003/09/12 by John Gough, Gough, John
Physics and Astronomy · #FOS: Physical sciences #Quantum Physics (quant-ph) #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/0309102
18 pages, no figures, updated with discussion on various notions of time-ordered exponentials (Ito/Stratonovich/exponentiated)and their distinct role in quantum stochastic limits
arxiv created 2005/11/06 · arxiv updated 2009/12/01
We discuss stochastic derivations, stochastic Hamiltonians and the flows that they generate, algebraic fluctuaion-dissipation theorems, etc., in a language common to both classical and quantum algebras. It is convenient to define distinct notions of time-ordered exponentials to take account of the breakdown of the Leibniz rule in the Ito calculus. We introduce a notion of quantum Stratonovich calculus and show how it relates to Stratonovich-Dyson time ordered exponentials. We then use it to demonstrate a natural way to add stochastic derivations.