Optimal prediction of the observable based on a partial measurement

Date/Time: 27 October 2010 / 15:00-16:00 - ()

Speaker: Dr. Fuyuhiko Tanaka (The University of Tokyo, Japan)

Let us consider the composite system of the N+M identical quantum states, each of which is specified by the unknown finite-dimensional parameter. Compared to usual quantum estimation or tomography scheme, we assume that we have only N+M resources available. Our task is to perform the measurement on the M subsystems and to predict the expectation of an arbitrary chosen observable (spin, momentum etc.) in the remaining N systems "after" obtaining the measurement outcome.