ICTS

Suppose we are given a sequence of quantum registers initialized to the same quantum state rho. Further suppose we would like to learn the state rho or some of its properties. That is, we would like to design an algorithm that produces a classical description of an approximation to the state, or to estimate the expectation values of some observables. How many copies of rho do we need to be able to produce suitable approximations? This series of talks will be an introduction to algorithms for such problems. The first talk will be aimed at a general audience.