Complete methods set for scalable ion trap quantum information processing

Abstract

Large-scale quantum information processors must be able to transport and maintain quantum information, and repeatedly perform logical operations. Here we demonstrate a combination of all the fundamental elements required to perform scalable quantum computing using qubits stored in the internal states of trapped atomic ions. We quantify the repeatability of a multi-qubit operation, observing no loss of performance despite qubit transport over macroscopic distances. Key to these results is the use of different pairs of beryllium ion hyperfine states for robust qubit storage, readout and gates, and simultaneous trapping of magnesium re-cooling ions along with the qubit ions.

9 pages, 4 figures. Accepted to Science, and thus subject to a press embargo

References in corpus (19)

• Elementary gates for quantum computation
• The Physical Implementation of Quantum Computation
• Quantum Computing with Very Noisy Devices
• Experimental Quantum State Tomography of Optical Fields and Ultrafast Statistical Sampling
• Unknown Quantum States and Operations, a Bayesian View
• Entanglement and quantum computation with ions in thermal motion
• Towards fault-tolerant quantum computing with trapped ions
• Overhead and noise threshold of fault-tolerant quantum error correction
• Long-lived qubit memory using atomic ions
• Process tomography of ion trap quantum gates
• Sympathetic cooling of ${}^{9}B{e}^{+}$ and ${}^{24}M{g}^{+}$ for quantum logic
• Errors in trapped-ion quantum gates due to spontaneous photon scattering
• Entangled Mechanical Oscillators
• High fidelity transport of trapped-ion qubits through an X-junction trap array
• Phase Control of Trapped Ion Quantum Gates
• Sympathetic ground state cooling and coherent manipulation with two-ion-crystals
• Sympathetic Cooling of Trapped Cd+ Isotopes
• Memory coherence of a sympathetically cooled trapped-ion qubit
• High fidelity entanglement of 43Ca+ hyperfine clock states

Cited by in corpus (144)

• Quantum Computing
• Trapped-Ion Quantum Computing: Progress and Challenges
• An Open-System Quantum Simulator with Trapped Ions
• An Elementary Quantum Network of Single Atoms in Optical Cavities
• The European Quantum Technologies Roadmap
• Universal digital quantum simulation with trapped ions
• Demonstration of the trapped-ion quantum-CCD computer architecture
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• New class of quantum error-correcting codes for a bosonic mode
• A Race Track Trapped-Ion Quantum Processor
• Single-qubit quantum memory exceeding $10$-minute coherence time
• Quantum Gates and Memory using Microwave Dressed States
• Controlling fast transport of cold trapped ions
• Coherent Diabatic Ion Transport and Separation in a Multi-Zone Trap Array
• Reliable Quantum State Tomography
• Shortcuts to adiabaticity by counterdiabatic driving for trapped-ion displacement in phase space
• Coherent Quantum Transport in Photonic Lattices
• Experimental Demonstration of a Robust and Scalable Flux Qubit
• Unconditional Room Temperature Quantum Memory
• Realisation of a programmable two-qubit quantum processor
• Entangling two transportable neutral atoms via local spin exchange
• Repeated multi-qubit readout and feedback with a mixed-species trapped-ion register
• Randomized Benchmarking of Multi-Qubit Gates
• Simulating open quantum systems: from many-body interactions to stabilizer pumping
• Entanglement Metrology Using a Joint Readout of Superconducting Qubits
• Controlling and measuring quantum transport of heat in trapped-ion crystals
• Systematic errors in current quantum state tomography tools
• Trapping of Topological-Structural Defects in Coulomb Crystals
• Normal modes of trapped ions in the presence of anharmonic trap potentials
• Hybrid quantum logic and a test of Bell's inequality using two different atomic isotopes
• Sympathetic Cooling of Mixed Species Two-Ion Crystals for Precision Spectroscopy
• Improved high-fidelity transport of trapped-ion qubits through a multi-dimensional array
• Imaging trapped ions with a microfabricated lens for quantum information processing
• Realization of holonomic single-qubit operations
• Two-dimensional ion trap lattice on a microchip
• Implementation of a symmetric surface electrode ion trap with field compensation using a modulated Raman effect
• Scalable creation of long-lived multipartite entanglement
• Sympathetic EIT laser cooling of motional modes in an ion chain
• Modes of Oscillation in Radiofrequency Paul Traps
• Demonstration of quantum brachistochrones between distant states of an atom
• Practical, Reliable Error Bars in Quantum Tomography
• Universal gate-set for trapped-ion qubits using a narrow linewidth diode laser
• Rydberg-Stark deceleration of atoms and molecules
• Dissipation-Assisted Quantum Information Processing with Trapped Ions
• Initialisation of single spin dressed states using shortcuts to adiabaticity
• Fault-Tolerant Operation of a Quantum Error-Correction Code
• Fast ion swapping for quantum information processing
• Quantum Control of Qubits and Atomic Motion Using Ultrafast Laser Pulses
• One-dimensional array of ion chains coupled to an optical cavity
• Error Compensation of Single-Qubit Gates in a Surface Electrode Ion Trap Using Composite Pulses
• How to wire a 1000-qubit trapped ion quantum computer
• Rydberg excitation of trapped cold ions: A detailed case study
• Microwave Near-Field Quantum Control of Trapped Ions
• Transversality and lattice surgery: exploring realistic routes towards coupled logical qubits with trapped-ion quantum processors
• Rydberg excitation of a single trapped ion
• Dissipative ground-state preparation of a spin chain by a structured environment
• Laser-induced charging of microfabricated ion traps
• Fast shuttling of a trapped ion in the presence of noise
• Fast transport of two ions in an anharmonic trap
• Zigzag Phase Transition in Quantum Wires
• Fast transport of mixed-species ion chains within a Paul trap
• Demonstrating Bayesian Quantum Phase Estimation with Quantum Error Detection
• Extensive characterization of a family of efficient three-qubit gates at the coherence limit
• Spatially uniform single-qubit gate operations with near-field microwaves and composite pulse compensation
• Quantum control of the motional states of trapped ions through fast switching of trapping potentials
• Tutorial: The trapped-ion qubit toolbox
• Sympathetic cooling and detection of a hot trapped ion by a cold one
• Integrated ${}^9$Be${}^{+}$ multi-qubit gate device for the ion-trap quantum computer
• Topological edge states in periodically-driven trapped-ion chains
• Generation of spin-motion entanglement in a trapped ion using long-wavelength radiation
• Parallel transport quantum logic gates with trapped ions
• Transport of multispecies ion crystals through a junction in an RF Paul trap
• Trapping ions with lasers
• Efficient photoionization for barium ion trapping using a dipole-allowed resonant two-photon transition
• Penning micro-trap for quantum computing
• Two-dimensional linear trap array for quantum information processing
• Entangling four logical qubits beyond break-even in a nonlocal code
• Reversing Hydride Ion Formation in Quantum Information Experiments with Be${}^{+}$
• High posterior density ellipsoids of quantum states
• Confidence Polytopes in Quantum State Tomography
• Hybrid Oscillator-Qubit Quantum Processors: Instruction Set Architectures, Abstract Machine Models, and Applications
• Geometric phase gate for entangling two Bose-Einstein condensates
• Fast shuttling of a particle under weak spring-constant noise of the moving trap
• Quantum Process Tomography of a Molmer-Sorensen Interaction
• Ground-state cooling of a trapped ion using long-wavelength radiation
• Multi-zone trapped-ion qubit control in an integrated photonics QCCD device
• Continuously parametrized quantum simulation of molecular electron transfer reactions
• Trapped ion scaling with pulsed fast gates
• Technologies for trapped-ion quantum information systems
• Shortcuts to adiabaticity for an ion in a rotating radially-tight trap
• Engineered Open Systems and Quantum Simulations with Atoms and Ions
• Visibility of Young's interference fringes: Scattered light from small ion crystals
• Quantum control beyond the adiabatic regime in 2D curved matter-wave guides
• Instantaneous braids and Dehn twists in topologically ordered states
• Quantum optics and frontiers of physics: The third quantum revolution
• Optimised surface-electrode ion-trap junctions for experiments with cold molecular ions
• Quantum computing with mixed states
• Ultrafast, high repetition rate, ultraviolet, fiber based laser source: application towards Yb+ fast quantum-logic
• Engineering topological states and quantum-inspired information processing using classical circuits
• Comparative numerical studies of ion traps with integrated optical cavities
• Universal Logical Gates on Topologically Encoded Qubits via Constant-Depth Unitary Circuits
• Proposal for laser-cooling of rare-earth ions
• Minimal instances for toric code ground states
• Entangling gates for trapped-ion quantum computation and quantum simulation
• Comparative study of quantum error correction strategies for the heavy-hexagonal lattice
• Optimization and implementation of a surface-electrode ion trap junction
• Individual Addressing in Quantum Computation through Spatial Refocusing
• Dark state cooling of a trapped ion using microwave coupling
• Ising interaction between two qubits composed of the highest magnetic quantum number states through magnetic dipole-dipole interaction
• Mode shaping in mixed ion crystals of 40Ca2+ and 40Ca+
• Randomized Benchmarking of Clifford Operators
• Robust dynamical exchange cooling with trapped ions
• Spatially-resolved potential measurement with ion crystals
• A single ion as a shot noise limited magnetic field gradient probe
• Micromotion minimization using Ramsey interferometry
• Individual addressing of trapped ion qubits with geometric phase gates
• Many-Body Physics with Trapped Ions
• Sub-Doppler Cavity Cooling Beyond The Lamb-Dicke Limit
• Comparison of confidence regions for quantum state tomography
• Low-excitation transport and separation of high-mass-ratio mixed-species ion chains
• Generalized Hamiltonian to describe imperfections in ion-light interaction
• Multi-ion sensing of dipolar noise sources in ion traps
• Quantum gates implementations in the separated ion-traps by fast laser pulses
• A modular entanglement-based quantum computer architecture
• Confidence polytopes for quantum process tomography
• Quantum Computation with Rotational States of Nonpolar Ionic Molecules
• Transport of charged particles by adjusting rf voltage amplitudes
• Quantum measurement induces a many-body transition
• Reachability in Controlled Markovian Quantum Systems: An Operator-Theoretic Approach
• Autonomous Stabilization of Floquet States Using Static Dissipation
• Active laser frequency stabilization using neutral praseodymium (Pr)
• Quantum gates using electronic and nuclear spins of Yb${}^{+}$ in a magnetic field gradient
• Lindblad-like quantum tomography for non-Markovian quantum dynamical maps
• Quantum computation with logical gates between hot systems
• Fast Ground State to Ground State Separation of Small Ion Crystals
• Efficient Eigenstate Preparation in an Integrable Model with Hilbert Space Fragmentation
• Partial randomized benchmarking
• Scalable, chip-based optically-controlled gates for quantum information processing
• Doubly-ionized lanthanum as a qubit candidate for quantum networks
• Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $\lambda {\varphi }^4$ model
• Multi-junction surface ion trap for quantum computing
• Closed-loop optimization of fast trapped-ion shuttling with sub-quanta excitation
• Quantum Skyrmions in Mixed States of Light and Their Nested Topology
• Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols