Journal
PHYSICAL REVIEW A
Volume 96, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.96.042306
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Funding
- U.S. ARL-CDQI program [W911NF-15-2-0061]
- European Union H FET-Proactive project RySQ
- Villum Foundation
- Villum Fonden [00007335] Funding Source: researchfish
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We propose a two-qubit gate for neutral atoms in which one of the logical state components adiabatically follows a two-atom dark state formed by the laser coupling to a Rydberg state and a strong resonant dipole-dipole exchange interaction between two Rydberg excited atoms. Our gate exhibits optimal scaling of the intrinsic error probability E alpha (B tau)(-1) with the interatomic interaction strength B and the Rydberg state lifetime tau. Moreover, the gate is resilient to variations in the interaction strength, and even for finite probability of double Rydberg excitation the gate does not excite atomic motion and experiences no decoherence due to internal-translational entanglement.
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