Generation of spatially broadband twin beams for quantum imaging

Abstract

We generate spatially multimode twin beams using 4-wave mixing in a hot atomic vapor in a phase-insensitive traveling-wave amplifier configuration. The far-field coherence area measured at 3.5 MHz is shown to be much smaller than the angular bandwidth of the process and bright twin images with independently quantum-correlated sub-areas can be generated with little distortion. The available transverse degrees of freedom form a high-dimensional Hilbert space which we use to produce quantum-correlated twin beams with finite orbital angular momentum.

5 pages, 5 figures

References in corpus (4)

• Strong relative intensity squeezing by 4-wave mixing in Rb vapor
• Ultraslow propagation of matched pulses by four-wave mixing in an atomic vapor
• Quantum limits in the measurement of very small displacements in optical images
• TEM10 homodyne detection as an optimal small displacement and tilt measurements scheme

Cited by in corpus (1)

• Strong low-frequency quantum correlations from a four-wave mixing amplifier