Controlling long ion strings for quantum simulation and precision measurements

Abstract

Scaling a trapped-ion based quantum simulator to a large number of ions creates a fully-controllable quantum system that becomes inaccessible to numerical methods. When highly anisotropic trapping potentials are used to confine the ions in the form of a long linear string, several challenges have to be overcome to achieve high-fidelity coherent control of a quantum system extending over hundreds of micrometers. In this paper, we describe a setup for carrying out many-ion quantum simulations including single-ion coherent control that we use for demonstrating entanglement in 50-ion strings. Furthermore, we present a set of experimental techniques probing ion-qubits by Ramsey and Carr-Purcell-Meiboom-Gill (CPMG) pulse sequences that enable detection (and compensation) of power-line-synchronous magnetic-field variations, measurement of path length fluctuations, and of the wavefronts of elliptical laser beams coupling to the ion string.

References in corpus (47)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• The Quantum Internet
• Probing many-body dynamics on a 51-atom quantum simulator
• QuTiP 2: A Python framework for the dynamics of open quantum systems
• The logarithmic negativity: A full entanglement monotone that is not convex
• Trapped-Ion Quantum Computing: Progress and Challenges
• Many-Body Physics with Individually-Controlled Rydberg Atoms
• Observation of a Many-Body Dynamical Phase Transition with a 53-Qubit Quantum Simulator
• Engineered 2D Ising interactions on a trapped-ion quantum simulator with hundreds of spins
• Effective quantum spin systems with ion traps
• Observation of entanglement propagation in a quantum many-body system
• Programmable Quantum Simulations of Spin Systems with Trapped Ions
• High-fidelity quantum logic gates using trapped-ion hyperfine qubits
• High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
• Probing entanglement entropy via randomized measurements
• Quantum Simulators: Architectures and Opportunities
• Demonstration of the trapped-ion quantum-CCD computer architecture
• Quantum spin dynamics and entanglement generation with hundreds of trapped ions
• Ion-trap measurements of electric-field noise near surfaces
• Symmetry Breaking and Topological Defect Formation in Ion Coulomb Crystals
• Observation of the Kibble-Zurek scaling law for defect formation in ion crystals
• Efficient tomography of a quantum many-body system
• High-fidelity laser-free universal control of two trapped ion qubits
• High-Fidelity Bell-State Preparation with ${}^{40}$Ca${}^{+}$ Optical Qubits
• Assessing the progress of trapped-ion processors towards fault-tolerant quantum computation
• Cryogenic Trapped-Ion System for Large Scale Quantum Simulation
• Experimental Uhrig Dynamical Decoupling using Trapped Ions
• EIT ground-state cooling of long ion strings
• Observing emergent hydrodynamics in a long-range quantum magnet
• Motional Fock states for quantum-enhanced amplitude and phase measurements with trapped ions
• Trapping of Topological-Structural Defects in Coulomb Crystals
• Quantum zigzag transition in ion chains
• Engineering of Microfabricated Ion Traps and Integration of Advanced On-Chip Features
• Linear Paul trap design for an optical clock with Coulomb crystals
• Near ground-state cooling of two-dimensional trapped-ion crystals with more than 100 ions
• Controlling systematic frequency uncertainties at the $10^{-19}$ level in linear Coulomb crystals
• Single-Spin Spectrum-Analyzer for a Strongly Coupled Environment
• Magnetic field stabilization system for atomic physics experiments
• Probing Nanofriction and Aubry-type signatures in a finite self-organized system
• Polarization-gradient cooling of 1D and 2D ion Coulomb crystals
• Radial two-dimensional ion crystals in a linear Paul trap
• Systematic uncertainty due to background-gas collisions in trapped-ion optical clocks
• Interference in a Prototype of a two-dimensional Ion Trap Array Quantum Simulator
• Observation of vibrational overtones by single molecule resonant photodissociation
• Scalable arrays of micro-Penning traps for quantum computing and simulation
• Quadrupole shift cancellation using dynamic decoupling
• A room-temperature ion trapping apparatus with hydrogen partial pressure below $10^{-11}$ mBar

Cited by in corpus (22)

• Exploring Large-Scale Entanglement in Quantum Simulation
• Quantum-enhanced sensing on an optical transition via emergent collective quantum correlations
• Controlling two-dimensional Coulomb crystals of more than 100 ions in a monolithic radio-frequency trap
• Experimental observation of thermalization with noncommuting charges
• Observation of magnon bound states in the long-range, anisotropic Heisenberg model
• Penning micro-trap for quantum computing
• A scaled local gate controller for optically addressed qubits
• Controlled-Controlled-Phase Gates for Superconducting Qubits Mediated by a Shared Tunable Coupler
• Industrially Microfabricated Ion Trap with 1 eV Trap Depth
• An integrated photonic engine for programmable atomic control
• Individual-Ion Addressing and Readout in a Penning Trap
• Comparison of Spontaneous Emission in Trapped Ion Multiqubit Gates at High Magnetic Fields
• Individual Addressing and State Readout of Trapped Ions Utilizing Radio-Frequency Micromotion
• Quantum error correction for long chains of trapped ions
• Efficient site-resolved imaging and spin-state detection in dynamic two-dimensional ion crystals
• Trapped particle evolution driven by residual gas collisions
• Experimental realization of nonunitary multi-qubit operations
• Individually-addressed quantum gate interactions using dynamical decoupling
• Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $\lambda {\varphi }^4$ model
• Bounded-Error Quantum Simulation via Hamiltonian and Lindbladian Learning
• Effective non-local parity-dependent couplings in qubit chains
• Characterization and cancellation of power-line-induced motional-mode frequency noise in a trapped-ion system