Excess-noise suppression for a squeezed state propagating through random amplifying media via wave-front shaping

Abstract

After propagating through a random amplifying medium, a squeezed state commonly shows excess noise above the shot-noise level. Since large noise can significantly reduce the signal-to-noise ratio, it is detrimental for precision measurement. To circumvent this problem, we propose a noise-reduction scheme using wavefront shaping. It is demonstrated that the average output quantum noise can be effectively suppressed even beyond the shot-noise limit. Both the decrease on amplification strength and the increase on input squeezing strength can give rise to a decrease in the suppressed average quantum noise. Our results not only show the feasibility of manipulating the output quantum noise of random amplifying media, but also indicate potential applications in quantum information processing in complex environments, such as, quantum imaging, quantum communication, and quantum key distribution.

References in corpus (7)

• Image Transmission Through an Opaque Material
• Phase control algorithms for focusing light through turbid media
• Large-scale photonic Ising machine by spatial light modulation
• Quantum Noise Interference and Back-action Cooling in Cavity Nanomechanics
• Blind focusing through strongly scattering media using wavefront shaping with nonlinear feedback
• Photon noise in a random laser amplifier with fluctuating properties
• Statistical distribution of quantum correlation induced by multiple scattering in the disordered medium