Quantum computation with longlived Rydberg-Landau atoms featuring suppressed ionization by the Magnetic Cage

Abstract: Atomic processing units require robust entanglement between individual qubits, typically achieved via excitation to highly interacting Rydberg states. However, short Rydberg lifetimes and ionization risks limit the quantum volume score of the atomic processing units. Inspired by Landau resonances in alkaline atoms, we introduce Rydberg-Landau (rLandau) states created under a strong magnetic field (2.5 Tesla). These states exhibit significantly extended lifetimes and a magnetic confinement mechanism that prevents ionization, even under intense laser fields. We analyze their wavefunctions, excitation dynamics, dipole transition rules, lifetimes, and interactions, identifying states optimal for high-fidelity quantum operations. This approach simplifies the coherent excitation of long-lived, strongly interacting rLandau circular states akin to Coulombic counterparts, enabling deeper and more complex quantum algorithms.