Characterizing micro-macro transitions with an atomic-vapor-based linear optical amplifier
arXiv:1605.07257
Abstract
Fundamentally, the dynamics of micro-macro transitions is instrumental to understanding the process of quantum-to-classical transitions; technologically, it can also facilitate the detection of the microscopic signals in quantum experiments via convenient detectors. Here, we demonstrate a scheme to characterize micro-macro transitions based on a four-wave mixing linear optical amplification process in a hot rubidium vapor. The linear optical amplifier provides a large optical gain of for injected single-photon-level pulses, enabling photon-number-resolving detection by average via non-single-photon counting detectors with a large dynamic range. The scheme exhibits strong dispersion which is sensitive to the input's change at the single-photon level, resulting in the group-velocity delay time scaling with , where is the average input photon number. The output probe and conjugate modes have different coefficients of this scaling, indicating the coefficient can serve as an efficient parameter to characterize the specified micro-macro transitions. The demonstrated results are generally applicable for quantum detection and optical signal processing in light-atom interfaces. Furthermore, the present system is suitable for the study of relevant time-resolved dynamics of the quantum-to-classical transitions.
9 pages, 7 figures
References in corpus (7)
- All-optical switching in rubidium vapor
- Strong low-frequency quantum correlations from a four-wave mixing amplifier
- Quantum-Enhanced Sensing Based on Time Reversal of Nonlinear Dynamics
- Ultraslow propagation of matched pulses by four-wave mixing in an atomic vapor
- Schroedinger Cat: Entanglement test in a Micro-Macroscopic system
- Quantum experiments with human eyes as detectors based on cloning via stimulated emission
- Time resolved quantum dynamics of double ionization in strong laser fields