Quantum interference induced photon localisation and delocalisation in coupled cavities

TL;DR

This paper investigates how quantum interference in coupled nonlinear cavities can control photon localisation and delocalisation, considering effects of dissipation and initial phase, revealing potential for quantum state manipulation.

Contribution

It introduces a model demonstrating controllable photon localisation/delocalisation via quantum interference, accounting for dissipation and initial phase effects.

Findings

Complete localisation or delocalisation achievable with proper parameters

Quantum interference can reduce dissipation effects

Initial phase influences localisation and delocalisation

Abstract

We study photon localisation and delocalisation in a system of two nonlinear cavities with intensity-dependent coupling. It is shown that complete localisation or delocalisation is possible for proper choices of the strengths of nonlinearity, detuning and inter-cavity coupling. Role of the relative phase in the initial superposition in attaining localisation and delocalisation is discussed. Effects of dissipation and decoherence are considered and the use of quantum interference in reducing dissipation is explored. Many of the features of the system are shown to be the consequences of quantum interference.