A High-Power Clock Laser Spectrally Tailored for High-Fidelity Quantum State Engineering

Abstract

Highly frequency-stable lasers are a ubiquitous tool for optical frequency metrology, precision interferometry, and quantum information science. While making a universally applicable laser is unrealistic, spectral noise can be tailored for specific applications. Here we report a high-power 698 nm clock laser with a maximum output of \SI{4}{W} and minimized frequency noise up to a few kHz Fourier frequency, together with long-term instability of $3.5\times 10^{-17}$ at one to thousands of seconds. The laser frequency noise is precisely characterized with atom-based spectral analysis that employs a pulse sequence designed to suppress sensitivity to intensity noise. This method provides universally applicable tunability of the spectral response and analysis of quantum sensors over a wide frequency range. With the optimized laser system characterized by this technique, we achieve an average single-qubit Clifford gate fidelity of up to $F_1^2=0.99964(3)$ when simultaneously driving 3000 optical qubits with a homogeneous Rabi frequency ranging from \SI{10}{Hz} to $\sim$$\SI{1}{kHz}$. This result represents the highest single optical-qubit gate fidelity for large number of atoms.

References in corpus (63)

• A High Phase-Space-Density Gas of Polar Molecules
• Logical quantum processor based on reconfigurable atom arrays
• Randomized Benchmarking of Quantum Gates
• Reliable Quantum Computers
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Robust randomized benchmarking of quantum processes
• Optimized Dynamical Decoupling in a Model Quantum Memory
• Decoherence in a superconducting quantum bit circuit
• 1/f noise: implications for solid-state quantum information
• 1.5 $\mu$m lasers with sub 10 mHz linewidth
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• High-fidelity parallel entangling gates on a neutral atom quantum computer
• Optical clock intercomparison with $6\times 10^{-19}$ precision in one hour
• High-fidelity control and entanglement of Rydberg atom qubits
• Quantum State Engineering and Precision Metrology using State-Insensitive Light Traps
• Gravitational wave detection with optical lattice atomic clocks
• A Fermi-degenerate three-dimensional optical lattice clock
• High-Fidelity Entanglement and Detection of Alkaline-Earth Rydberg Atoms
• A New Method for Gravitational Wave Detection with Atomic Sensors
• Entanglement-Enhanced Optical Atomic Clock
• Robust dynamical decoupling for quantum computing and quantum memory
• Randomized benchmarking of single qubit gates in a 2D array of neutral atom qubits
• High-fidelity gates with mid-circuit erasure conversion in a metastable neutral atom qubit
• Precision Metrology Meets Cosmology: Improved Constraints on Ultralight Dark Matter from Atom-Cavity Frequency Comparisons
• Single Ion Quantum Lock-In Amplifier
• Analysis of imperfections in the coherent optical excitation of single atoms to Rydberg states
• Comparison of Two Independent Sr Optical Clocks with 1e-17 Stability at 10^3 s
• Imaging optical frequencies with 100 $\mu$Hz precision and 1.1 $\mu$m resolution
• High-Fidelity Bell-State Preparation with ${}^{40}$Ca${}^{+}$ Optical Qubits
• Rotating-frame relaxation as a noise spectrum analyzer of a superconducting qubit undergoing driven evolution
• Realizing spin squeezing with Rydberg interactions in a programmable optical clock
• Arbitrary quantum control of qubits in the presence of universal noise
• A Resonant Mode for Gravitational Wave Detectors based on Atom Interferometry
• Error-resistant Single Qubit Gates with Trapped Ions
• Robust Dynamic Hamiltonian Engineering of Many-Body Spin Systems
• Quantum sensing with atomic, molecular, and optical platforms for fundamental physics
• Multi-qubit gates and Schrödinger cat states in an optical clock
• Flux qubit noise spectroscopy using Rabi oscillations under strong driving conditions
• Optical spectrum analyzer with quantum limited noise floor
• High-order noise filtering in nontrivial quantum logic gates
• Universal quantum operations and ancilla-based readout for tweezer clocks
• Versatile Digital GHz Phase Lock for External Cavity Diode Lasers
• Benchmarking and fidelity response theory of high-fidelity Rydberg entangling gates
• Thermodynamics of a deeply degenerate SU($N$)-symmetric Fermi gas
• Engineering Quantum States of Matter for Atomic Clocks in Shallow Optical Lattices
• Reducing the linewidth of a diode laser below 30 Hz by stabilization to a reference cavity with finesse above 10^5
• Sensitivity of quantum gate fidelity to laser phase and intensity noise
• Dicke superradiance in ordered arrays of multilevel atoms
• Fast, high-fidelity addressed single-qubit gates using efficient composite pulse sequences
• Wide bandwidth phase-locked diode laser with an intra-cavity electro-optic modulator
• Two-axis twisting using Floquet-engineered XYZ spin models with polar molecules
• Ultrahigh-fidelity composite rotational quantum gates
• Pound-Drever-Hall Feedforward: Laser Phase Noise Suppression beyond Feedback
• Active cancellation of servo-induced noise on stabilized lasers via feedforward
• Decoherence of a Driven Qubit
• General Formalism for Evaluating the Impact of Phase Noise on Bloch Vector Rotations
• Simple phase noise measurement scheme for cavity-stabilized laser systems
• Robust Higher-Order Hamiltonian Engineering for Quantum Sensing with Strongly Interacting Systems
• Dephasing of qubits by transverse low-frequency noise
• Enhanced quantum state transfer via feedforward cancellation of optical phase noise
• Exploring the dynamical interplay between mass-energy equivalence, interactions and entanglement in an optical lattice clock
• High-fidelity imaging of a band insulator in a three-dimensional optical lattice clock
• Measurement and feed-forward correction of the fast phase noise of lasers

Cited by in corpus (2)

• Clock precision beyond the Standard Quantum Limit at $10^{-18}$ level
• Universal gates for a metastable qubit in strontium-88