Presentation on theme: "Quantum trajectories for the laboratory: modeling engineered quantum systems Andrew Doherty University of Sydney."— Presentation transcript:
Quantum trajectories for the laboratory: modeling engineered quantum systems Andrew Doherty University of Sydney
Goal of this lecture will be to develop a model of the most important aspects of this experiment using the theory of quantum trajectories I hope the discussion will be somewhat tutorial and interactive.
Notes on this calculation Fidelity of entangled state has same dependence on physical parameters as for HOM experiment. Need propagation phases to be constant over interval between photons Easy to see that other factors like detector efficiency and path length difference after the beam splitter factor out also Timing error hasn’t been included here, could be done easily by modeling the pulse that prepares the state e. This is another kind of mode-match error and would look much like the dependence on the decay rates. Note that difference in the delay time for the two paths factors out. This is because we have modeled the propagation of the single photon pulse as if the beam were perfectly monochromatic. This approximation is valid because we are in the Markov regime but if the delays are too large, this needs to be corrected