Thermal state truncation by using quantum scissors device

TL;DR

This paper demonstrates how a quantum scissors device can truncate a thermal state to produce a non-Gaussian state with nonclassical properties, including negativity of the Wigner function, and enhances signal amplification and noise ratio.

Contribution

It introduces a method to generate non-Gaussian states from thermal states using quantum scissors, revealing nonclassical features and improved signal properties.

Findings

Generated non-Gaussian states exhibit negativity in Wigner function.

The method achieves signal amplification and improves signal-to-noise ratio.

Thermal state truncation enables nonclassical state preparation.

Abstract

A non-Gaussian state being a mixture of the vacuum and single-photon states can be generated by truncating a thermal state in a quantum scissors device of Pegg et al. [Phys. Rev. Lett. 81 (1998) 1604]. In contrast to the thermal state, the generated state shows nonclassical property including the negativity of Wigner function. Besides, signal amplification and signal-to-noise ratio enhancement can be achieved.