Quantum electrodynamics and quantum optics

PHYS-453

How are the correlated-two-photon state defined? C...

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  1. How are the correlated-two-photon state defined? Can they be separated into a product of two single photon states?
  2. Which element enables precise tuning of delay between pulses? In this setting, does the detector's timing resolution impose any limitation?
  3. What is physically being measured?  How to describe the propagation of optical field in Heisenberg picture? How displacement of the BS appears as a delay in the field expression at the detectors.
  4. What's the spatial coherence extent of the optical pulses and how they are determined from IF filters? What is the width of the dip feature in coincidence measurement, is it consistent with the spatial coherence length?
  5. What are the physical mechanisms that result in lower interference visibility? (Photon Flux rate? Detector resolution? Detector noise  (dark count)?)