Parametric pairing creates flat Bogoliubov bands with long-range quantum correlations controlled by a geometric length scale from complex-momentum singularities, enabling sub-vacuum squeezing far beyond compact-generator support.

#QuantumGeometry #BogoliubovModes #QuantumSqueezing

Femtosecond laser pulses trigger anisotropic quantum squeezing of roton pairs in superfluid helium, explaining ultrafast birefringence oscillations through parametric excitation and multimode quantum interference effects.

#QuantumSqueezing #SuperfluidHelium #Research

Fundamental quantum limits constrain squeezing in bosonic systems: canonical commutation relations impose lower bounds on mode-optimal quadrature variances (minimum 1, or 1/2 with parametric driving). Directly applicable to optomechanical experiments.

#QuantumSqueezing #QuantumControl #Research