High-fidelity Rydberg controlled-Z gates with optimal pulses

Abstract

High-fidelity control-$Z$ ($C_Z$) gates are essential and mandatory to build a large-scale quantum computer. In neutral atoms, the strong dipole-dipole interactions between their Rydberg states make them one of the pioneering platforms to implement $C_Z$ gates. Here we numerically investigate the time-optimal pulses to generate a high-fidelity Rydberg $C_Z$ gate in a three-level ladder-type atomic system. By tuning the temporal shapes of Gaussian or segmented pulses, the populations on the intermediate excited states are shown to be suppressed within the symmetric gate operation protocol, which leads to a $C_Z$ gate with a high Bell fidelity up to $99.92\%$. These optimized pulses are robust to thermal fluctuations and the excitation field variations. Our results promise a high-fidelity and fast gate operation under amenable and controllable experimental parameters, which goes beyond the adiabatic operation regime under a finite Blockade strength.

arXiv comment6 figures

References in corpus (43)

• Quantum Computing in the NISQ era and beyond
• Surface codes: Towards practical large-scale quantum computation
• Quantum information with Rydberg atoms
• The Physical Implementation of Quantum Computation
• QuTiP 2: A Python framework for the dynamics of open quantum systems
• QuTiP: An open-source Python framework for the dynamics of open quantum systems
• Fast quantum gates for neutral atoms
• Suppressing quantum errors by scaling a surface code logical qubit
• Observation of Rydberg blockade between two atoms
• An atom-by-atom assembler of defect-free arbitrary 2d atomic arrays
• Observation of collective excitation of two individual atoms in the Rydberg blockade regime
• Quantum Error Correction for Beginners
• Parallel implementation of high-fidelity multi-qubit gates with neutral atoms
• Synthetic three-dimensional atomic structures assembled atom by atom
• Demonstration of multi-qubit entanglement and algorithms on a programmable neutral atom quantum computer
• High-fidelity parallel entangling gates on a neutral atom quantum computer
• High-fidelity control and entanglement of Rydberg atom qubits
• Exponential suppression of bit or phase flip errors with repetitive error correction
• Quantum simulation and computing with Rydberg-interacting qubits
• Quantum gates and multi-particle entanglement by Rydberg excitation blockade and adiabatic passage
• High-fidelity Rydberg quantum gate via a two-atom dark state
• Robustness of high-fidelity Rydberg gates with single-site addressability
• High-fidelity Rydberg-blockade entangling gate using shaped, analytic pulses
• Symmetric Rydberg controlled-Z gates with adiabatic pulses
• Evolutionary Algorithms for Hard Quantum Control
• Designing High-Fidelity Single-Shot Three-Qubit Gates: A Machine Learning Approach
• High fidelity entanglement of neutral atoms via a Rydberg-mediated single-modulated-pulse controlled-PHASE gate
• Quantum logic and entanglement by neutral Rydberg atoms: methods and fidelity
• Robust Mølmer-Sørensen gate for neutral atoms using rapid adiabatic Rydberg dressing
• The Quantum Speed Limit of Optimal Controlled Phasegates for Trapped Neutral Atoms
• Two-qubit gates using adiabatic passage of the Stark-tuned Förster resonances in Rydberg atoms
• Scalable multilayer architecture of assembled single-atom qubit arrays in a three-dimensional Talbot tweezer lattice
• Robust control and optimal Rydberg states for neutral atom two-qubit gates
• Fast, Accurate, and Realizable Two-Qubit Entangling Gates by Quantum Interference in Detuned Rabi Cycles of Rydberg Atoms
• Suppress motional dephasing of ground-Rydberg transition for high-fidelity quantum control with neutral atoms
• Doppler-resilient ground-Rydberg transition and its application in high-fidelity entangling gates with neutral atoms
• Application of adiabatic passage in Rydberg atomic ensembles for quantum information processing
• Protocols for Rydberg entangling gates featuring robustness against quasi-static errors
• Single temporal-pulse-modulated parameterized controlled-phase gate for Rydberg atoms
• Accurate Quantum Logic Gates by Spin Echo in Rydberg Atoms
• Neutral atom entanglement using adiabatic Rydberg dressing
• Parallel syndrome extraction with shared flag qubits for Calderbank-Shor-Steane codes of distance three
• Efficient diagnostics for quantum error correction

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