Josephson Traveling Wave Parametric Amplifiers as Non-Classical Light Source for Microwave Quantum Illumination

TL;DR

This paper explores the use of Josephson Traveling Wave Parametric Amplifiers as sources of entangled microwave radiation, enhancing quantum illumination techniques for detecting low-reflectivity objects.

Contribution

It demonstrates the potential of JTWPAs to generate wide-bandwidth two-mode squeezed vacuum states for quantum metrology and information processing.

Findings

JTWPAs can produce entangled microwave states suitable for quantum illumination

Wide bandwidth of JTWPAs enhances quantum detection capabilities

Potential applications in quantum metrology and information processing

Abstract

Detection of low-reflectivity objects can be enriched via the so-called quantum illumination procedure. In order that this quantum procedure outperforms classical detection protocols, entangled states of microwave radiation are initially required. In this paper, we discuss the role of Josephson Traveling Wave Parametric Amplifiers (JTWPAs), based on circuit-QED components, as suitable sources of a two-mode squeezed vacuum state, a special signal-idler entangled state. The obtained wide bandwidth makes the JTWPA an ideal candidate for generating quantum radiation in quantum metrology and information processing applications.