Generating squeezed vacuum field with non-zero orbital angular momentum with atomic ensembles

Abstract

We demonstrated that by using a pump field with non-zero orbital angular momentum (OAM) in the polarization self-rotation squeezing process it is possible to generate a squeezed vacuum optical field with the matching OAM. We found a similar level of maximum quantum noise reduction for a first-order Laguerre-Gaussian pump beam and a regular Gaussian pump beam, even though the optimal operational conditions differed in these two cases. Also, we investigated the effect of self-defocusing on the level of the vacuum squeezing by simultaneously monitoring the minimum quantum noise level and the output beam transverse profile at various pump laser powers and atomic densities, and found no direct correlations between the increased beam size and the degree of measured squeezing.

References in corpus (5)

• Beating the channel capacity limit for linear photonic superdense coding
• Strong low-frequency quantum correlations from a four-wave mixing amplifier
• Generation of spatially broadband twin beams for quantum imaging
• Quantum Enhanced Magnetometer with Low-Frequency Squeezing
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Cited by in corpus (5)

• Gaussian Beam-Propagation Theory for Nonlinear Optics - Featuring an Exact Treatment of Orbital Angular Momentum Transfer
• Spatial Multi-Mode Structure of Atom-Generated Squeezed Light
• Multi-pass configuration for Improved Squeezed Vacuum Generation in Hot Rb Vapor
• Why a hole is like a beam splitter--a general diffraction theory for multimode quantum states of light
• Engineering of Quantum State by Time-Dependent Decoherence-Free Subspaces