Advanced Quantum Noise
arXiv:1305.6614 · doi:10.1088/1367-2630/16/1/013011
Abstract
We use the quantum correlations of twin-beams of light to probe the added noise when one of the beams propagates through a medium with anomalous dispersion. The experiment is based on two successive four-wave mixing processes in rubidium vapor, which allow for the generation of bright two-mode-squeezed twin-beams followed by a controlled advancement while maintaining the shared quantum-correlations between the beams. The demonstrated effect allows the study of irreversible decoherence in a medium exhibiting anomalous dispersion, and for the first time shows the advancement of a bright nonclassical state of light. The advancement and corresponding degradation of the quantum correlations are found to be operating near the fundamental quantum limit imposed by using a phase-insensitive amplifier.
12 pages, 4 figures
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- Multiple electromagnetically induced transparency, slow and fast light in hybrid optomechanics
- Mitigating scattering in a quantum system using only an integrating sphere
- Propagation of a squeezed optical field in a medium with superluminal group velocity