In a theoretical study published in Phys. Rev. Lett., an international team of researchers including Dr. Paraskevas Tzallas (Research Director at FORTH-IESL) and Mr. Th. Lamprou (PhD student conducting his research at FORTH-IESL) demonstrates the generation of multimode squeezed and entangled light states by intense laser-atom interaction. The findings open the way for the generation of high intensity squeezed light states for a wide range of applications in AMO physics and quantum technology.
 

Squeezed optical fields are a powerful resource for a variety of investigations in basic research and technology. However, the generation of intense squeezed light is challenging. Here, we show that intense squeezed light can be produced using strongly laser driven atoms and the so far unrelated process of high harmonic generation. We demonstrate that when the intensity of the driving field significantly depletes the ground state of the atoms, leading to dipole moment correlations, the quantum state of the driving field and the generated high harmonics are entangled and squeezed. Furthermore, we analyze how the resulting quadrature squeezing of the fundamental laser mode after the interaction can be controlled. The findings open the way for the generation of high intensity squeezed light states for a wide range of applications in AMO physics and quantum technology.

The study, published in Phys. Rev. Lett. [1], has been conducted by an international team of researchers including Dr. Paraskevas Tzallas (Research Director at FORTH-IESL) and Mr. Th. Lamprou (PhD student conducting his research at FORTH-IESL).

Reference

[1] P. Stammer et al., Phys. Rev. Lett. 132, 143603 (2024). https://doi.org/10.1103/PhysRevLett.132.143603