De Klaus Mølmer
Noise correlations in experiments played a pertinent role in the establishment of the non-classical properties of light. Glauber’s theory of photodetection and the master equation for light emitting quantum systems permit calculation of average signals and signal correlations, and for decades these theories formed the main curriculum of theoretical quantum optics (supplemented with occasional reference to the intuition of quantum jumps). With the development of quantum trajectory theory, we now track the dynamics of the state of individual, open quantum systems, conditioned on a real (or simulated) measurement record. This theory establishes a link between master equation theory and the general theory of quantum measurement and it fills a need for the modelling and control of such systems. After a brief review of the above concepts, I shall turn to a discussion of how the measurement back action in the quantum trajectories establishes a conditioned dynamics and hence not only an occasional, but a general connection with the correlation functions that we can obtain from master equations. Building on this insight, we shall go beyond Glauber and discuss less conventional, out-of-time-order correlation functions and experimental schemes that can measure them.
De Florian Marquardt
De Gary Steele
De Hendrik Bluhm
De Jean-Michel Raimond
De Alain Sarlette
De Sylvain Schwartz
De Sophia Economou
De Klaus Mølmer
De Howard M. Wiseman
De Michel Devoret
De Akira Furusawa
De Yanhong Xiao
De Alex Retzker
De Nicolas Didier
De Ivan Deutsch
De Mankei Tsang
De Aashish Clerk
De Valentina Parigi
De Rebing Wu
De Michael Biercuk
De Thomas Ayral
De Nana Liu
De Nana Liu
