Anti-Parity-Time Symmetric Optical Four-Wave Mixing in Cold Atoms

Degenerate and Non-degenerate Four-wave Mixing in Cold Cesium Atoms with Optical Pumping

Quantum Squeezed Light Propagation in an Optical Parity-Time (PT)-Symmetric Structure

We investigate the medium effect of a parity-time (PT)-symmetric bilayer on the quantum optical properties of an incident squeezed light at zero temperature (T=0 K). To do so, we use the canonical quantization approach and describe the amplification and dissipation properties of the constituent layers of the bilayer structure by Lorentz model to analyze the quadrature squeezing of the outgoing ...

Demonstration of orbital angular momentum conservation in coherent Four-Wave mixing in cold atoms

We report on the generation of light carrying orbital angular momentum through Bragg diffraction into an electromagnetically induced coherence grating in a degenerate two-level system of cold cesium atoms, demonstrating the conservation the conservation of orbital angular momentum of light in a coherent four-wave mixing process. The induced Zeeman coherence grating is shown to contain the spati...

Bunching-induced asymmetry in degenerate four-wave mixing with cold atoms

G. L. Gattobigio, F. Michaud, J. Javaloyes, J. W. R. Tabosa, and R. Kaiser Institut Non Linéaire de Nice, UMR 6618 CNRS, 1361 route des Lucioles, F-06560 Valbonne, France Dipartimento di Fisica dell’Universita’ di Ferrara and INFN-Sezione di Ferrara, 44100 Ferrara, Italy Department de Fisica Interdisciplinar, IMEDEA (CSIC-UIB), C/Miquel Marques, 21, E-07190 Esporles, Spain Departamento de Fisic...

Anti-parity–time symmetry with flying atoms

The recently developed notion of parity–time (PT) symmetry in optical systems has spawned intriguing prospects. So far, most experimental implementations have been reported in solid-state systems. Here, we report the first experimental demonstration of optical anti-PT symmetry—the counterpart of conventional PT symmetry—in a warm atomic-vapour cell. Rapid coherence transport via flying atoms le...