Microwave Near-Field Quantum Control of Trapped Ions

Abstract

Microwave near-field quantum control of spin and motional degrees of freedom of 25Mg+ ions can be used to generate two-ion entanglement, as recently demonstrated in Ospelkaus et al. [Nature 476, 181 (2011)]. Here, we describe additional details of the setup and calibration procedures for these experiments. We discuss the design and characteristics of the surface-electrode trap and the microwave system, and compare experimental measurements of the microwave near-fields with numerical simulations. Additionally, we present a method that utilizes oscillating magnetic-field gradients to detect micromotion induced by the ponderomotive radio-frequency potential in linear traps. Finally, we discuss the present limitations of microwave-driven two-ion entangling gates in our system.

arXiv comment12 pages and 10 figures

References in corpus (34)

• Quantum Computing
• Quantum Computing with Very Noisy Devices
• Quantum computation with ions in thermal motion
• Reliable Quantum Computers
• Fault-tolerant quantum computation with high threshold in two dimensions
• Entanglement and quantum computation with ions in thermal motion
• Heating of trapped ions from the quantum ground state
• Towards fault-tolerant quantum computing with trapped ions
• A microfabricated surface-electrode ion trap for scalable quantum information processing
• Overhead and noise threshold of fault-tolerant quantum error correction
• Ion-trap quantum logic using long-wavelength radiation
• Microwave quantum logic gates for trapped ions
• Scaling and Suppression of Anomalous Quantum Decoherence in Ion Traps
• Complete methods set for scalable ion trap quantum information processing
• Controlling fast transport of cold trapped ions
• Coherent Diabatic Ion Transport and Separation in a Multi-Zone Trap Array
• Suppression of Heating Rates in Cryogenic Surface-Electrode Ion Traps
• Trapped-ion quantum logic gates based on oscillating magnetic fields
• Single-qubit-gate error below 10^-4 in a trapped ion
• Scalable ion traps for quantum information processing
• Reduction of anomalous heating in an in-situ-cleaned ion trap
• Realisation of a programmable two-qubit quantum processor
• Trapped-ion probing of light-induced charging effects on dielectrics
• Temperature Dependence of Electric Field Noise Above Gold Surfaces
• Randomized Benchmarking of Multi-Qubit Gates
• Fabrication and heating rate study of microscopic surface electrode ion traps
• Electrostatics of surface-electrode ion traps
• Improved high-fidelity transport of trapped-ion qubits through a multi-dimensional array
• Laserless trapped-ion quantum simulations without spontaneous scattering using microtrap arrays
• Design, Fabrication, and Experimental Demonstration of Junction Surface Ion Traps
• Sideband cooling and coherent dynamics in a microchip multi-segmented ion trap
• Microfabricated Ion Traps
• Reduction of heating rate in a microfabricated ion trap by pulsed-laser cleaning
• Quantum Magnetism of Spin-Ladder Compounds with Trapped-Ion Crystals

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• Technologies for trapped-ion quantum information systems
• Fast flux control of 3D transmon qubits using a magnetic hose
• Multilayer ion trap with three-dimensional microwave circuitry for scalable quantum logic applications
• Trapped Rydberg ions: a new platform for quantum information processing
• Shuttling of Rydberg ions for fast entangling operations
• Spin and motion dynamics with zigzag ion crystals in transverse magnetic field gradients
• Inductively guided circuits for ultracold dressed atoms
• Neural-network-based parameter estimation for quantum detection
• Numerical optimization of amplitude-modulated pulses in microwave-driven entanglement generation
• Entangling gates for trapped-ion quantum computation and quantum simulation
• Coherent Control of Trapped Ion Qubits with Localized Electric Fields
• Fabrication of Surface Ion Traps with Integrated Current Carrying Wires enabling High Magnetic Field Gradients
• Hybrid setup for stable magnetic fields enabling robust quantum control
• Individual addressing of trapped ion qubits with geometric phase gates
• Surface-electrode trap with an integrated permanent magnet for generating a magnetic-field gradient at trapped ions
• Micromotion minimisation by synchronous detection of parametrically excited motion
• Individually-addressed quantum gate interactions using dynamical decoupling
• Measuring molecular electric dipoles using trapped atomic ions and ultrafast laser pulses
• In-situ characterization of qubit drive-phase distortions
• Error bounds for the Floquet-Magnus expansion and their application to the semiclassical quantum Rabi model