Magnetically Engineered Rydberg Orbitals: Landau Quantization for Scalable Neutral-Atom Quantum Logic

Highly excited Rydberg atoms underpin a broad range of quantum-technology applications. However, current neutral-atom platforms face key bottlenecks: limited Rydberg lifetimes, constraints on scalability, long-range connectivity, and pronounced susceptibility to ionization under strong driving. We propose a route to mitigate these limitations by engineering Rydberg–Landau (rLandau) states in strong magnetic fields. For B=2.5T, quadratic magnetic confinement quantizes the transverse electronic motion into discrete Landau levels with a cyclotron radius of 16nm, forming a magnetic “cage” that suppresses laser-induced ionization even at high intensities and fast operation, while the axial motion remains Rydberg-like on the µm scale. This orbital engineering reduces wavefunction overlap and relaxes electron-exchange constraints, enabling denser qubit arrays and extending the effective range of Rydberg interactions toward all-to-all connectivity. Together, these features indicate a path toward deeper quantum circuits in neutral-atom processors by combining enhanced coherence, ionization protection, and reduced lattice spacing.

 

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