How do you approach the concept of quantum coherence in topological photonics?

Sample interview questions: How do you approach the concept of quantum coherence in topological photonics?

Sample answer:

Quantum coherence in topological photonics refers to the behavior of photons in topological materials, where their quantum states remain preserved and entangled over long distances. As a theoretical physicist specializing in this field, my approach to understanding quantum coherence in topological photonics involves a combination of mathematical modeling, theoretical frameworks, and experimental validations.

Firstly, I would start by exploring the fundamental principles of topological photonics, which involve the study of how light propagates and interacts with materials that possess nontrivial topological properties. This includes examining the underlying mathematical concepts of topology, such as Berry phases and geometric phases, which play a crucial role in the behavior of photons in topological materials.

To understand quantum coherence in this context, I would delve into the quantum mechanical description of light-matter interactions. This would involve applying the principles of quantum electrodynamics (QED) to describe the interaction of photons with the electronic states of the topological materials. By considering the quantum nature of light and its interaction with the topological band structures, I can analyze how coherence is affected by various factors, such as the presence of impurities, disorder, or external fields.

Using theoretical models, I would investigate the unique properties of topological materials that enable robust quantum coherence. For instance, I would study the emergence of protected edge states in topo… Read full answer


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