High-fidelity Rydberg quantum gate via a two-atom dark state

Abstract

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 $E\propto (B\tau {)}^{-1}$ 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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References in corpus (9)

• Simple pulses for elimination of leakage in weakly nonlinear qubits
• Quasiclassical calculations of BBR-induced depopulation rates and effective lifetimes of Rydberg nS, nP and nD alkali-metal atoms with n < 80
• Fidelity of quantum operations
• Dipole blockade in a cold Rydberg atomic sample
• Coherent dipole-dipole coupling between two single atoms at a Förster resonance
• Strongly correlated growth of Rydberg aggregates in a vapor cell
• Scalable designs for quantum computing with rare-earth-ion-doped crystals
• Binding potentials and interaction gates between microwave-dressed Rydberg atoms
• Creation and transfer of non-classical states of motion using Rydberg dressing of atoms in a lattice

Cited by in corpus (13)

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• Enhancement of coherent dipole coupling between two atoms via squeezing a cavity mode
• Doppler-resilient ground-Rydberg transition and its application in high-fidelity entangling gates with neutral atoms
• Geometric quantum speed limits and short-time accessibility to unitary operations
• Unselective ground-state blockade of Rydberg atoms for implementing quantum gates
• One-step implementation of Toffoli gate for neutral atoms based on unconventional Rydberg pumping
• Single-site Rydberg addressing in 3D atomic arrays for quantum computing with neutral atoms
• Two-qubit atomic gates: Spatio-temporal control of Rydberg interaction
• Optically Tailored Trapping Geometries for Ultracold Atoms on a Type-II Superconducting Chip
• Scalability and high-efficiency of an $(n+1)$-qubit Toffoli gate sphere via blockaded Rydberg atoms
• Time-Optimal Two- and Three-Qubit Gates for Rydberg Atoms