Manipulating photonic signals by a multipurpose quantum junction

TL;DR

This paper demonstrates how a quantum junction with three-level atoms can manipulate photon wave packets by storing, delaying, splitting, or routing them, offering a versatile tool for quantum photonic applications.

Contribution

The study introduces a novel quantum junction design capable of multiple photon manipulation functions using a three-level atomic system with external control.

Findings

Photon pulses can be stored, delayed, split, or routed.

The quantum junction acts as a multipurpose photonic device.

The design is promising for quantum information processing.

Abstract

We show that photon wave packets can be manipulated and reshaped in various ways by a quantum junction comprising a set of three-level atoms coupling two waveguides. We consider atomic nodes with the $\Lambda$-scheme of allowed optical transitions, one of which is driven by an external classical control field. Addressing the dynamics of wave packets in such a system, we demonstrate that a photon pulse can be either stored partially in the junction, delayed by a controlled time, split into several parts, or routed into one of the selected output channels. We argue, therefore, that our proposed design is a promising prototype of a multipurpose quantum junction.