Quantum optomechanical system in a Mach-Zehnder interferometer

We consider an oscillating micromirror replacing one of the two fixed mirrors a Mach-Zehnder interferometer. In this ideal optical set-up quantum oscillator is subjected to radiation pressure interaction travelling light waves, no cavity involved. This configuration shows that squeezed can be generated by pure scattering on system, without involving cavity. The squeezing detected at output ports interferometer either direct detection or measuring spectrum difference current. use Hudson-Parthasarathy equation model global evolution. It describe photons and resulting oscillator. allows also with thermal bath. way we have unitary dynamics giving evolution fields. Bose fields stochastic calculus related generalized Weyl operators allow whole circuit. By working in Heisenberg picture, Langevin equations for position momentum arise, which are used monitoring continuous time ports. case strong laser weak highly non-classical produced, revealed (a negative Mandel Q-parameter found), intensity current photodetector; second nearly complete cancellation shot noise reached. last it appears together corresponds homodyne scheme, so say apparatus squeezing.