Transport quantum logic gates for trapped ions

Abstract

Many efforts are currently underway to build a device capable of large scale quantum information processing (QIP). Whereas QIP has been demonstrated for a few qubits in several systems, many technical difficulties must be overcome in order to construct a large-scale device. In one proposal for large-scale QIP, trapped ions are manipulated by precisely controlled light pulses and moved through and stored in multizone trap arrays. The technical overhead necessary to precisely control both the ion geometrical configurations and the laser interactions is demanding. Here we propose methods that significantly reduce the overhead on laser beam control for performing single and multiple qubit operations on trapped ions. We show how a universal set of operations can be implemented by controlled transport of ions through stationary laser beams. At the same time, each laser beam can be used to perform many operations in parallel, potentially reducing the total laser power necessary to carry out QIP tasks. The overall setup necessary for implementing transport gates is simpler than for gates executed on stationary ions. We also suggest a transport-based two-qubit gate scheme utilizing microfabricated permanent magnets that can be executed without laser light.

31 pages, 5 figures, minor improvements in figures and notation, submitted to PRA

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Cited by in corpus (28)

• Quantum computing with trapped ions
• Towards fault-tolerant quantum computing with trapped ions
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• Trapped-ion quantum logic gates based on oscillating magnetic fields
• High-fidelity laser-free universal control of two trapped ion qubits
• Electrostatics of surface-electrode ion traps
• Normal modes of trapped ions in the presence of anharmonic trap potentials
• Laserless trapped-ion quantum simulations without spontaneous scattering using microtrap arrays
• Individual addressing of ions using magnetic field gradients in a surface-electrode ion trap
• A bosonic Josephson junction controlled by a single trapped ion
• Versatile laser-free trapped-ion entangling gates
• Efficient, stabilized two-qubit gates on a trapped-ion quantum computer
• Quantum dynamics of an atomic double-well system interacting with a trapped ion
• Generation of spin-motion entanglement in a trapped ion using long-wavelength radiation
• Parallel transport quantum logic gates with trapped ions
• Scalable, high-fidelity all-electronic control of trapped-ion qubits
• Ion transport and reordering in a two-dimensional trap array
• Ideal intersections for radio-frequency trap networks
• A trapped-ion local field probe
• Transport-enabled entangling gate for trapped ions
• Optimization and implementation of a surface-electrode ion trap junction
• Coherent Control of Trapped Ion Qubits with Localized Electric Fields
• Implementation of many-qubit Grover search with trapped ultracold ions
• Low-excitation transport and separation of high-mass-ratio mixed-species ion chains
• Microfabrication techniques for trapped ion quantum information processing
• Time-dependent Hamiltonian estimation for Doppler velocimetry of trapped ions
• Quantum Compiling by Deep Reinforcement Learning
• Geometric and holonomic quantum computation