Fast Quantum Gates for Neutral Atoms Separated by a Few Tens of Micrometers

2025/11/25 by Bergonzoni, Matteo, Riso, Rosario Roberto, Pupillo, Guido · 2 citations
#FOS: Physical sciences #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2511.20437

Abstract

We present a theoretical scheme for a family of fast and high-fidelity two-qubit iSWAP gates between neutral atoms separated by more than 20 um, enabled by resonant dipole-dipole spin-exchange interactions between Rydberg states. The protocol harnesses coherent excitation-exchange-deexcitation dynamics between the qubit and the Rydberg states within a single and smooth laser pulse, in the presence of strong dipole-dipole interactions. We utilize optimal control methods to achieve theoretical gate fidelities and durations comparable to blockade-based gates in the presence of relevant noise, while extending the effective interaction range by an order of magnitude. This enables entanglement well beyond the blockade radius, offering a route toward fast, high-connectivity quantum processors.

Citations

• Expanding the Neutral Atom Gate Set: Native iSWAP and Exchange Gates from Dipolar Rydberg Interactions
• Low-depth quantum error correction via three-qubit gates in Rydberg atom arrays
• Fault-Tolerant Stabilizer Measurements in Surface Codes with Three-Qubit Gates
• Quantum computing with atomic qubit arrays: confronting the cost of connectivity
• Benchmarking direct and indirect dipolar spin-exchange interactions between two Rydberg atoms
• The iSWAP gate with polar molecules: Robustness criteria for entangling operations
• Fast entangling gates for Rydberg atoms via resonant dipole-dipole interaction
• Quantum gates between distant atoms mediated by a Rydberg excitation antiferromagnet
• A universal neutral-atom quantum computer with individual optical addressing and non-destructive readout
• Low-Overhead Transversal Fault Tolerance for Universal Quantum Computation
• Spectroscopy and modeling of ¹⁷¹Yb Rydberg states for high-fidelity two-qubit gates
• Architecture for fast implementation of qLDPC codes with optimized Rydberg gates
• High-tolerance antiblockade SWAP gates using optimal pulse drivings
• Constant-Overhead Fault-Tolerant Quantum Computation with Reconfigurable Atom Arrays
• Dipolar spin-exchange and entanglement between molecules in an optical tweezer array
• Dipolar physics: a review of experiments with magnetic quantum gases
• Exploiting Long-Distance Interactions and Tolerating Atom Loss in Neutral Atom Quantum Architectures

Cited by

• Expanding the Neutral Atom Gate Set: Native iSWAP and Exchange Gates from Dipolar Rydberg Interactions
• Blockade-induced exchange primitives for scalable neutral-atom QPU

Related

• Expanding the Neutral Atom Gate Set: Native iSWAP and Exchange Gates from Dipolar Rydberg Interactions
• Fast entangling gates for Rydberg atoms via resonant dipole-dipole interaction
• Quantum gates between distant atoms mediated by a Rydberg excitation antiferromagnet
• Multi-qubit Rydberg gates between distant atoms
• Multi-Qubit Parity Gates for Rydberg Atoms in Various Configurations