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

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

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