Coherence preservation of a single neutral atom qubit transferred between magic-intensity optical traps

Abstract

We demonstrate that the coherence of a single mobile atomic qubit can be well preserved during a transfer process among different optical dipole traps (ODTs). This is a prerequisite step in realizing a large-scale neutral atom quantum information processing platform. A qubit encoded in the hyperfine manifold of ${}^{87}$Rb atom is dynamically extracted from the static quantum register by an auxiliary moving ODT and reinserted into the static ODT. Previous experiments were limited by decoherences induced by the differential light shifts of qubit states. Here we apply a magic-intensity trapping technique which mitigates the detrimental effects of light shifts and substantially enhances the coherence time to $225\pm 21\mathrm{ms}$. The experimentally demonstrated magic trapping technique relies on the previously neglected hyperpolarizability contribution to the light shifts, which makes the light shift dependence on the trapping laser intensity to be parabolic. Because of the parabolic dependence, at a certain "magic" intensity, the first order sensitivity to trapping light intensity variations over ODT volume is eliminated. We experimentally demonstrate the utility of this approach and measure hyperpolarizability for the first time. Our results pave the way for constructing a scalable quantum-computing architectures with single atoms trapped in an array of magic ODTs.

arXiv comment6 pages, 5 figures

References in corpus (25)

• Quantum Simulation
• Quantum information with Rydberg atoms
• The Physical Implementation of Quantum Computation
• Randomized benchmarking of single qubit gates in a 2D array of neutral atom qubits
• Dynamical polarizability of atoms in arbitrary light fields: general theory and application to cesium
• Two-dimensional transport and transfer of a single atomic qubit in optical tweezers
• Analysis of dephasing mechanisms in a standing wave dipole trap
• Fast Ground State Manipulation of Neutral Atoms in Microscopic Optical Traps
• Exploring the Quantum Speed Limit with Computer Games
• Entanglement of light-shift compensated atomic spin waves with telecom light
• Fast Quantum State Control of a Single Trapped Neutral Atom
• A crossed vortex bottle beam trap for single-atom qubits
• A quantum computation architecture using optical tweezers
• A Continuous Non-demolition Measurement of the Cs Clock Transition Pseudo-spin
• Experimental observation of magic-wavelength behavior in optical lattice-trapped ${}^{87}$Rb
• Magic frequencies for cesium primary frequency standard
• Suppression of inhomogeneous broadening in rf spectroscopy of optically trapped atoms
• Light storage in a magnetically-dressed optical lattice
• Theory of "magic" optical traps for Zeeman-insensitive clock transitions in alkalis
• Nondestructive light-shift measurements of single atoms in optical dipole traps
• Differential Light Shift Cancellation in a Magnetic-Field-Insensitive Transition of ${}^{87}$Rb
• Magic polarization for optical trapping of atoms without Stark-induced dephasing
• "Doubly-magic" conditions in magic-wavelength trapping of ultracold alkalis
• Interaction induced decay of a heteronuclear two-atom system
• Ultrastable Optical Clock with Neutral Atoms in an Engineered Light Shift Trap

Cited by in corpus (33)

• Quantum computing with atomic qubits and Rydberg interactions: Progress and challenges
• Rydberg atom quantum technologies
• Quantum simulation and computing with Rydberg-interacting qubits
• Erasure conversion for fault-tolerant quantum computing in alkaline earth Rydberg atom arrays
• A concise review of Rydberg atom based quantum computation and quantum simulation
• Noisy intermediate-scale quantum computers
• Universal gate operations on nuclear spin qubits in an optical tweezer array of ${}^{171}$Yb atoms
• Hyperpolarizability and operational magic wavelength in an optical lattice clock
• Decoherence-protected memory for a single-photon qubit
• High Fidelity Single-qubit Gates of a Single Neutral Atom in the Magic-Intensity Optical Dipole Trap
• Defect-free arbitrary-geometry assembly of mixed-species atom arrays
• Cavity-Enhanced Atom-Photon Entanglement with Subsecond Lifetime
• Photon recoil and laser focusing limits to Rydberg gate fidelity
• Optimizing High-Efficiency Quantum Memory with Quantum Machine Learning for Near-Term Quantum Devices
• Doubly magic optical trapping for Cs atom hyperfine clock transitions
• Influence of ground-Rydberg coherence in two-qubit gate based on Rydberg blockade
• Efficient preparation of 2D defect-free atom arrays with near-fewest sorting-atom moves
• Non-Markovianity and coherence of a moving qubit inside a leaky cavity
• Single atom movement with dynamic holographic optical tweezers
• Transporting long-lived quantum spin coherence in a photonic crystal fiber
• Zeeman-insensitive cooling of a single atom to its two-dimensional motional ground state in tightly focused optical tweezers
• Deterministic Fast Scrambling with Neutral Atom Arrays
• Balanced Coherence Times of Mixed-Species Atomic Qubits in a Dual $3\times 3$ Magic-Intensity Optical Dipole Trap Array
• Triply magic conditions for microwave transitions of optically trapped alkali-metal atoms
• A quantum processor based on coherent transport of entangled atom arrays
• Extending the coherence time limit of a single-alkali-atom qubit by suppressing phonon-jumping-induced decoherence
• Adiabatic potentials of cesium $(n{D}_J{)}_2$ Rydberg-Rydberg macrodimers
• A fiber array architecture for atom quantum computing
• Magic intensity trapping of the Mg lattice clock with light shift suppressed below $10^{-19}$
• Coherence of a dynamically decoupled single neutral atom
• Gate fidelity, dephasing, and "magic" trapping of optically trapped neutral atom
• Relativistic hyperpolarizabilities for atomic H, Li, and Be${}^{+}$ systems
• Experimental study of tune-out wavelengths for spin-dependent optical lattice in ${}^{87}$Rb Bose-Einstein condensation