- Letter
Nondegenerate internal squeezing: An all-optical, loss-resistant quantum technique for gravitational-wave detection
Phys. Rev. D 106, L041101 – Published 5 August, 2022
DOI: https://doi.org/10.1103/PhysRevD.106.L041101
Abstract
The detection of kilohertz-band gravitational waves promises discoveries in astrophysics, exotic matter, and cosmology. To improve the kilohertz quantum noise–limited sensitivity of interferometric gravitational-wave detectors, we investigate nondegenerate internal squeezing: optical parametric oscillation inside the signal-recycling cavity with distinct signal-mode and idler-mode frequencies. We use an analytic Hamiltonian model to show that this stable, all-optical technique is tolerant to decoherence from optical detection loss and that it, with its optimal readout scheme, is feasible for broadband sensitivity enhancement.
