Title: Quantum Technologies using thermal and cold Rydberg atoms

Authors: Yashica Jindal, Aishwarya Thakur, Shovan Kanti Barik,

Silpa B S, Swarnava Barui, Keerthi V, Shovan Dutta and Sanjukta Roy

Raman Research Institute, Bangalore, India

Rydberg atoms are giant atoms with the outer electron in a highly excited state with large values of the principal quantum number n. Rydberg atoms are highly sensitive to external fields imparting these atoms extraordinary characteristics for Quantum sensing of electromagnetic fields. We report our measurements on the Quantum Sensing with thermal as well as cold Rydberg atoms. We present our recent results on Doppler-Enhanced Quantum magnetometry with thermal Rydberg atoms and compare them with detailed theoretical modelling with excellent agreement. We report our recent observations on the effect of interatomic interaction in cold Rydberg atoms.

Our measurements on highly excited Rydberg atoms are directed towards Quantum sensing, Quantum information processing and Quantum simulation of many-body physics with individual Rydberg atoms in an array of optical tweezers.