# Comparison of lower order and higher order nonclassicality in photon added and photon subtracted squeezed coherent states

## TL;DR

This paper compares the nonclassical properties of photon added and photon subtracted squeezed coherent states, highlighting how photon addition enhances nonclassicality more than subtraction, using various criteria and measures.

## Contribution

It provides a detailed comparison of higher order nonclassicalities in photon added and subtracted states, introducing quantitative analysis with nonclassical volume.

## Key findings

- Both states exhibit strong nonclassicality across multiple criteria.
- Photon addition increases nonclassicality more than photon subtraction.
- Nonclassical volume analysis quantifies the enhancement due to photon addition.

## Abstract

Nonclassical properties of photon added and photon subtracted squeezed coherent states have been compared with specific focus on the higher order nonclassicalities, such as higher order squeezing, higher order sub-Poissonian photon statistics, higher order antibunching. It is observed that both photon added and photon subtracted squeezed coherent states are highly nonclassical as they satisfy criteria for all of the above mentioned nonclassicalities and a set of other criteria including negativity of Wigner function, Klyshko's criterion and Agarwal's $(A_{3})$ parameter. Further, the amount of nonclassicality present in these two types of states has been compared quantitatively using a measure of nonclassicality known as nonclassical volume. Variation in the amount of nonclassicality with the number of photon(s) added/subtracted is also investigated, and it is found that the addition of photons makes the squeezed coherent state more nonclassical than what is done by the subtraction of photons.