Trapped Ion Quantum Computing using Optical Tweezers and Electric Fields

Abstract

We propose a new scalable architecture for trapped ion quantum computing that combines optical tweezers delivering qubit state-dependent local potentials with oscillating electric fields. Since the electric field allows for long-range qubit-qubit interactions mediated by the center-of-mass motion of the ion crystal alone, it is inherently scalable to large ion crystals. Furthermore, our proposed scheme does not rely on either ground state cooling or the Lamb-Dicke approximation. We study the effects of imperfect cooling of the ion crystal, as well as the role of unwanted qubit-motion entanglement, and discuss the prospects of implementing the state-dependent tweezers in the laboratory.

arXiv comment5 pages, 3 figures

References in corpus (19)

• Quantum computation with ions in thermal motion
• Effective quantum spin systems with ion traps
• High-fidelity quantum logic gates using trapped-ion hyperfine qubits
• High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
• A simple formula for the average gate fidelity of a quantum dynamical operation
• Quantum dynamics of cold trapped ions, with application to quantum computation
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• A quantum information processor with trapped ions
• High-fidelity readout of trapped-ion qubits
• Entanglement and Tunable Spin-Spin Couplings Between Trapped Ions Using Multiple Transverse Modes
• Single-qubit-gate error below 10^-4 in a trapped ion
• Phase Control of Trapped Ion Quantum Gates
• Precision measurement and compensation of optical Stark shifts for an ion-trap quantum processor
• Scalable and Parallel Tweezer Gates for Quantum Computing with Long Ion Strings
• Manipulating phonons of a trapped-ion system using optical tweezers
• Engineering spin-spin interactions with optical tweezers in trapped ions
• High-fidelity ion-trap quantum computing with hyperfine clock states
• Optical super-resolution sensing of a trapped ion's wave packet size
• Shuttling of Rydberg ions for fast entangling operations

Cited by in corpus (8)

• Robust two-qubit trapped ions gates using spin-dependent squeezing
• Grating design methodology for tailored free-space beam-forming
• Enhanced dark-state sideband cooling in trapped atoms via photon-mediated dipole-dipole interactions
• Chiral-coupling-assisted refrigeration in trapped ions
• Dynamics of quantum discommensurations in the Frenkel-Kontorova chain
• Transverse Polarization Gradient Entangling Gates for Trapped-Ion Quantum Computation
• Near-resonant light scattering by an atom in a state-dependent trap
• A method of an on-demand beamsplitter for trapped-ion quantum computers