Anisotropic deformation of Rydberg blockade sphere in few-atom systems

Abstract

Rydberg blockade sphere persists an intriguing picture by which a number of collective many-body effects caused by the strong Rydberg-Rydberg interactions can be clearly understood and profoundly investigated. In the present work, we develop a new definition for the effective two-atom blockade radius and show that the original spherically shaped blockade surface would be deformed when the real number of atoms increases from two to three. This deformation of blockade sphere reveals spatially anisotropic and shrunken properties which strongly depend on the interatomic distance. In addition, we also study the optimal conditions for the Rydberg antiblockade effect and make predictions for improving the antiblockade efficiency in few-atom systems.

7 pages, 3 figures, submitted to Physical Review A

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Cited by in corpus (8)

• Demonstration of a strong Rydberg blockade in three-atom systems with anisotropic interactions
• Rydberg superatoms: An artificial quantum system for quantum information processing and quantum optics
• Unidirectional and controllable higher-order diffraction by a Rydberg electromagnetically induced grating
• Assembled arrays of Rydberg-interacting atoms
• Chirped Multi-photon adiabatic passage for a four-level ladder-type Rydberg excitation
• Resonance-enhanced collective effect in a triangle arrangement of Rydberg atoms with anisotropic interactions
• Scalability and high-efficiency of an $(n+1)$-qubit Toffoli gate sphere via blockaded Rydberg atoms
• Deterministic facilitated excitation of the weakly-driven atom in heteronuclear Rydberg atom pairs beyond antiblockade