Kishore Thapliyal

Quantum Enhancement in Sensing and Photonic?Technologies

Quantum systems exhibit remarkable sensitivity to external disturbances, making them ideal for sensing applications. Quantum sensing offers unprecedented levels of precision and sensitivity compared to classical methods.  

Existence of quantum exceptional point singularities presents an opportunity to enhance quantum sensing capabilities and accelerate entanglement generation. However, the potential advantages of improved quantum sensing are counteracted by an increase in quantum noise, unlike the scenario for entanglement generation. Nonetheless, sensors designed to exploit singularities in non-Hermitian dynamical generator matrices, operating away from exceptional point singularities, hold promise for enhancing quantum sensing capabilities. This research aims to investigate the speed up of entanglement generation in multiqubit and multimode bosonic systems by leveraging these singularities. The relationship between singularity-enhanced sensing and entanglement generation will be explored to determine if they can coexist independently.  

Additionally, machine learning algorithms will be developed for characterizing and reconstructing single- and multi-mode quantum states, with potential applications in quantum cryptographic protocols for sensing and computation. These algorithms will be validated using experimental data, including benchmarking single photon sources. The relevance of quantum state engineering techniques for high intensity quantum states will be theoretically analysed to counter their quantum-to-classical transition. Potential applications of such states will be explored in secure quantum remote sensing and quantum secure multiparty computation. This project has the potential to influence numerous aspects of daily life, spanning healthcare, banking, environmental monitoring, defense, and navigation.