Non-destructive optical read-out and manipulation of circular Rydberg atoms

• URL: http://arxiv.org/abs/2509.24691v1
• Date: Mon, 29 Sep 2025 12:26:47 GMT
• Title: Non-destructive optical read-out and manipulation of circular Rydberg atoms
• Authors: Yohann Machu, Andrés Durán-Hernández, Gautier Creutzer, Aurore Alice Young, Jean-Michel Raimond, Michel Brune, Clément Sayrin,
• Abstract summary: Circular Rydberg atoms combine the strong dipole-dipole interactions typical of Rydberg states with long lifetimes.<n>Low-angular-momentum laser-accessible Rydberg levels have been so far mostly used.<n>We combine an array of logical laser-trapped circular Rydberg atoms of rubidium with an auxiliary array of Rb ancilla atoms transiently excited to a low-$ell$ Rydberg level.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Among the thriving quantum computation and quantum simulation platforms based on arrays of Rydberg atoms, those using circular Rydberg atoms are particularly promising. These atoms uniquely combine the strong dipole-dipole interactions typical of Rydberg states with long lifetimes. However, low-angular-momentum ($\ell$) laser-accessible Rydberg levels have been so far mostly used, because circular Rydberg atoms have no optical transitions, hindering their individual detection and manipulation. We remove this limitation with a hybrid platform, combining an array of logical laser-trapped circular Rydberg atoms of rubidium with an auxiliary array of Rb ancilla atoms transiently excited to a low-$\ell$ Rydberg level. We perform a quantum non-demolition detection of the logical qubit with the ancilla, through the blockade of the ancilla optical excitation induced by a F\"orster resonance. Conversely, we locally manipulate the logical qubit through the excitation of the ancilla. This dual-Rydberg platform is highly promising for quantum computation and simulation. It adds to the circular-atom toolbox the mid-circuit measurements, essential for error correction. More strikingly, it gives access to time correlations in long-term quantum simulations, uniquely accessible to circular Rydberg atoms.

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