Fundamental bound on entanglement generation between interacting Rydberg atoms

2025/12/15 by Georgios Doultsinos, Doultsinos, Georgios, Antonis Delakouras +3 · 1 citation
Computer Science · Physics and Astronomy · #FOS: Physical sciences #Laser-Matter Interactions and Applications #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.2512.13379

openalex publication_date 2025/12/15 · openalex created_date 2025/12/17 · openalex updated_date 2026/07/28

Abstract

We analytically derive the fundamental lower bound for the preparation fidelity of a maximally-entangled (Bell) state of two atoms involving Rydberg-state interactions. This bound represents the minimum achievable error E ≥ ( 1 + π/2 ) Γ/B due to spontaneous decay Γ of the Rydberg states and their finite interaction strength B. Using quantum optimal control methods, we identify laser pulses for preparing a maximally-entangled state of a pair of atomic qubits with an error only 1% above the derived fundamental bound.

Citations

• High-fidelity universal gates in the ¹⁷¹Yb ground state nuclear spin qubit
• Architecture for fast implementation of qLDPC codes with optimized Rydberg gates

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• An asymmetric and fast Rydberg gate protocol for long range entanglement

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