Continuous-mode multi-photon filtering

Understand

The purpose of this paper is to derive filters for an arbitrary open quantum system driven by a light wavepacket prepared in a continuous-mode multi-photon state.

• A continuous-mode multi-photon state is a state of a travelling light wavepacket that contains a definite number of photons and is characterised by a temporal (or equivalently spectral) profile.
• After the interaction with the system, the outgoing light can be monitored by means of homodyne detection or photodetection.
• Filters for both measurement schemes are derived in this paper.