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Physics Seminar: Many-body physics with spin states of trapped Rydberg atoms

November 17, 2021, 11:30 am - 12:30 pm
Location Richardson Hall - 256
SponsorPhysics Club, Physics & Astronomy DepartmentPosted InCollege of Science and Mathematics
Svetlana Malinovskaya

Title: Many-body physics with spin states of trapped Rydberg atoms

Speaker: Prof. Svetlana Malinovskaya (Stevens Institute of Technology)

Atoms in their highly excited electronic states, referred to as Rydberg atoms, have extraordinary nonlinear optical properties. Such atoms are highly polarizable and interact with each other via the dipole-dipole interactions or the van-der-Waals interactions. When optically trapped at ultra-cold temperatures, Rydberg atoms possess quantum properties that are strongly dependent on their interatomic interactions leading to condensed matter-like collective behavior. Owing to these
features, Rydberg atoms became a new platform to study quantum many-body physics. Spin degrees of freedom of trapped Rydberg atoms bring rich new physics including quantum magnetism, new quantum phases, entanglement and other non-local correlations. Entanglement is a crucial resource in many quantum information and quantum communication tasks. In this talk, I will discuss properties of alkali rubidium atoms trapped in an optical lattice and excited to Rydberg states by laser radiation. I will present a quantum control methodology to create entangled states and will show that the entangled states of Rydberg atoms can be used to create the multiphoton entangled radiation states in a cavity and in free space. The methodology provides a key step toward the resolution of a general problem of creating entanglement in high-dimensional quantum entities.