Laser Plasma Interaction and Non-classical Properties of Radiation Field

TL;DR

This paper investigates how short-term plasma interactions can generate non-classical radiation states, and how thermalization at low temperatures affects these properties, using a new squeezing measure and photon statistics analysis.

Contribution

It introduces a novel approach to produce non-classical states via plasma interaction and applies a stricter squeezing measure to analyze these quantum properties.

Findings

Short-term plasma interaction creates non-classical radiation states.

Thermalization at low temperatures can also produce non-classical states.

Thermalized photons exhibit super-Poissonian statistics.

Abstract

We show by explicit calculations that non-classical states of the radiation field can be produced by allowing short term interaction between a coherent state of the radiation field with plasma. Whereas, long term interaction, which thermalizes the radiation field, can produce non-classical states of the radiation field only at sufficiently small temperatures. A measure of k-th order squeezing, stricter than the one proposed by Zhang et al, is used to check the emergence of squeezing. It is also shown that photons in the considered thermalized field would follow super-Poissonian statistics.