Non-Gaussian quantum states of a multimode light field

This implies that for photon-added and -subtracted pure states the state is passively separable if and only if the subtraction or addition takes place in a mode from the mode basis

We showed that subtraction and addition in a mode for which the initial Gaussian Wigner function takes the form (10) leaves the state passively separable; i.e., any entanglement can

We show that an Optical Parametric Oscillator which is simultaneously resonant for several modes, either spatial or temporal, generates both below and above threshold a

To get the highest homodyne efficiency, the phases of the quantum field and local oscillator have to be matched (see Section III). Assuming the phase θ LO of the local oscillator to

(4) Without conditioning upon photon detection, and since the gaussian nature of the initial vacuum state is pre- served by the Bogoliubov transform, the homodyne mea- surements

Single mode quantum noise reduction in picosecond frequency combs has already been achieved with a Synchronously Pumped Optical Parametric Oscillator (SPOPO) [17], which is an

We initialize the field in |0〉 by first absorbing thermal photons with ∼10 atoms prepared in g and tuned to resonance with the cavity mode (residual photon number ∼

Previous theoretical works on the quantum properties of SPOPOs below threshold [12, 21, 22] have shown that SPOPOs generate multimode squeezed frequency combs and that there