In a neutral-atom tweezer array

PHYSICS · Multi-part · Fermi University Physics · Quantum Information & Technology · Physical realizations and quantum technologies · Physical realizations and quantum technologies

Quantum Information and Technology, Ch Trapped ions, neutral atoms, photons, NMR and spins in solids

Problem

In a neutral-atom tweezer array, two rubidium atoms are excited to a Rydberg state with van der Waals coefficient C6=5.0×10−60 J m6C_6 = 5.0\times10^{-60}\,\mathrm{J\,m^6}. The Rydberg-exciting laser drives the transition at Rabi frequency Ω/2π=2.0 MHz\Omega/2\pi = 2.0\,\mathrm{MHz}. The blockade radius is Rb=(C6/ℏΩ)1/6R_b = (C_6/\hbar\Omega)^{1/6}. ((a)) Compute RbR_b, in micrometres. ((b)) If Ω\Omega is increased tenfold while C6C_6 is unchanged, find the new blockade radius.

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