Rotational Coherence Times of Polar Molecules in Optical Tweezers

Abstract

Qubit coherence times are critical to the performance of any robust quantum computing platform. For quantum information processing using arrays of polar molecules, a key performance parameter is the molecular rotational coherence time. We report a 93(7) ms coherence time for rotational state qubits of laser cooled CaF molecules in optical tweezer traps, over an order of magnitude longer than previous systems. Inhomogeneous broadening due to the differential polarizability between the qubit states is suppressed by tuning the tweezer polarization and applied magnetic field to a "magic" angle. The coherence time is limited by the residual differential polarizability, implying improvement with further cooling. A single spin-echo pulse is able to extend the coherence time to nearly half a second. The measured coherence times demonstrate the potential of polar molecules as high fidelity qubits.

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Cited by in corpus (50)

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• Sub-millisecond Entanglement and iSWAP Gate between Molecular Qubits
• Enriching the quantum toolbox of ultracold molecules with Rydberg atoms
• Narrow-line imaging of single strontium atoms in shallow optical tweezers
• Two-axis twisting using Floquet-engineered XYZ spin models with polar molecules
• A terahertz vibrational molecular clock with systematic uncertainty at the $10^{-14}$ level
• Observation of Rydberg blockade due to the charge-dipole interaction between an atom and a polar molecule
• Optical Trapping of a Polyatomic Molecule in an $\ell$-Type Parity Doublet State
• Seconds-scale coherence on nuclear spin transitions of ultracold polar molecules in 3D optical lattices
• Theoretical Aspects of Radium-Containing Molecules Amenable to Assembly from Laser-Cooled Atoms for New Physics Searches
• Molecular Laser-Cooling in a Dynamically Tunable Repulsive Optical Trap
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• Robust nuclear spin entanglement via dipolar interactions in polar molecules
• Bichromatic Imaging of Single Molecules in an Optical Tweezer Array
• Engineering field-insensitive molecular clock transitions for symmetry violation searches
• Rotational spectroscopy of a single molecular ion at sub part-per-trillion resolution
• Æ codes
• Fast optical transport of ultracold molecules over long distances
• Quantum simulation of the central spin model with a Rydberg atom and polar molecules in optical tweezers
• Sympathetic cooling and slowing of molecules with Rydberg atoms
• Strategies for implementing quantum error correction in molecular rotation
• Precise, super-resolving intensity measurement by quantum jump spectroscopy of a single neutral atom
• Long-lived multilevel coherences and spin-1 dynamics encoded in the rotational states of ultracold molecules
• Laser cooling of molecules
• The iSWAP gate with polar molecules: Robustness criteria for entangling operations
• Direct measurement of high-lying vibrational repumping transitions for molecular laser cooling
• Scheme for Deterministic Loading of Laser-Cooled Molecules into Optical Tweezers
• Domain-Wall Ferroelectric Polarons in a two-dimensional Rotor Lattice Model
• Spin Squeezing with Itinerant Dipoles: A Case for Shallow Lattices
• An Electro-Optical Trap for Polar Molecules
• Rotational properties of two interacting cold polar molecules: linear, symmetric, and asymmetric tops
• Probing rotational decoherence with a trapped-ion planar rotor
• Dressed-State Spectroscopy and Magic Trapping of Microwave-Shielded NaCs Molecules
• DiPolMol-Py: A Python package for calculations for ${}^2\Sigma$ ground-state molecules
• The Li + CaF $\to$ Ca + LiF chemical reaction under cold conditions
• Nanofibre-based trap for Rb${}_2$ molecule
• Tunnel-coupled optical microtraps for ultracold atoms
• Engineered Molecular Clock Transitions for Symmetry Violation Searches
• Control of Dipolar Dynamics by Geometrical Programming
• Hyperfine van der Waals repulsion between open-shell polar molecules
• First-order phase transition in atom-molecule quantum degenerate mixtures with coherent three-body recombination
• Parity-Doublet Coherence Times in Optically Trapped Polyatomic Molecules
• Narrowline Laser Cooling and Spectroscopy of Molecules via Stark States
• Scalable platform for qudit-based quantum computing using polar molecules