Spatial squeezing in bright twin beams generated with four-wave mixing: constraints on characterization with an EMCCD camera
arXiv:1911.06034 · doi:10.1103/PhysRevA.100.063828
Abstract
The observation of spatial quantum noise reduction, or spatial squeezing, with a large number of photons can lead to a significant advantage in quantum imaging and quantum metrology due to the scaling of the signal-to-noise ratio with the number of photons. Here we present a systematic study of the limiting factors that play a role on the measurement of spatial squeezing with an electron-multiplying charge coupled device (EMCCD) camera in the limit of bright quantum states of light generated with a four-wave mixing process in an atomic vapor cell. We detect a total number of photons per beam of the order 10 in 1 s pulses, which corresponds to a photon flux per beam of the order of 10 photons per second. We then investigate the role of different parameters, such as cell temperature, pump power, laser detunings, scattered pump background noise, and timing sequences for the image acquisition with the EMCCD camera, on the level of spatial squeezing. We identify critical parameters to obtain an optimum squeezing level and demonstrate that for bright beams it is essential to acquire images at a rate fast enough to overcome the effect of classical technical noise.
References in corpus (19)
- Experimental realization of sub-shot-noise quantum imaging
- Spatial correlations in parametric down-conversion
- Role of entanglement in two-photon imaging
- Imaging high-dimensional spatial entanglement with a camera
- Strong low-frequency quantum correlations from a four-wave mixing amplifier
- Real applications of quantum imaging
- Detection of sub-shot-noise spatial correlation in high-gain parametric down-conversion
- Simultaneous near-field and far field spatial quantum correlations in spontaneous parametric down-conversion
- Experimental generation of multiple quantum correlated beams from hot rubidium vapor
- Ultrasensitive measurement of MEMS cantilever displacement sensitivity below the shot noise limit
- Quantum-Enhanced Plasmonic Sensing
- Measurement of sub-shot-noise spatial correlations without subtraction of background
- Einstein-Podolsky-Rosen paradox in twin images
- Quantum correlations by four-wave mixing in an atomic vapor in a non-amplifying regime: a quantum beam splitter for photons
- Einstein-Podolsky-Rosen Entanglement of Narrowband Photons from Cold Atoms
- Observation of Spatial Quantum Correlations in the Macroscopic Regime
- Einstein-Podolsky-Rosen paradox in a hybrid bipartite system
- Comparison of coherence area measurement techniques for bright entangled twin beams
- Transport of spatial quantum correlations through an optical waveguide
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- Transmission Estimation at the Cramér-Rao Bound for Squeezed States of Light in the Presence of Loss and Imperfect Detection
- Quantum-Limited Squeezed Light Detection with a Camera
- Low-Light Shadow Imaging using Quantum-Noise Detection with a Camera
- Parallel Quantum-Enhanced Sensing
- Temporal Quantum Noise Reduction Acquired by an Electron-Multiplying Charge-Coupled-Device Camera
- Quantum fluctuations spatial mode profiler
- Localized to delocalized spatial quantum correlation evolution in structured bright twin beams