Supercurrent and its quantum statistical properties in mesoscopic Josephson junction in presence of non-classical light fields

TL;DR

This paper explores how nonclassical light fields influence the supercurrent and its quantum statistical properties in mesoscopic Josephson junctions, revealing effects like squeezing and quantum coherence.

Contribution

It provides a detailed analysis of the impact of nonclassical light on supercurrent behavior and distinguishes between different nonclassical light states in mesoscopic Josephson junctions.

Findings

Supercurrent exhibits squeezing and quantum coherence effects.

The MJJ can differentiate between classical and nonclassical light fields.

Distinct responses to even and odd coherent-state light fields.

Abstract

In this paper, we study the supercurrent in a mesoscopic Josephson junction (MJJ) and its quantum statistical properties in the presence of nonclassical light fields. We investigate in detail the influence of external nonclassical light fields on current-voltage step structures of the MJJ. We also study in detail quantum statistical properties of the supercurrent when the external quantum electromagnetic fields are even and odd coherent-state light fields. It is shown that the supercurrent in the MJJ exhibits both squeezing effect and quantum coherences. It is demonstrated that the MJJ can feel the difference not only between classical light fields and nonclassical light fields but also between different nonclassical light fields.