Micromotion-Enhanced Fast Entangling Gates For Trapped Ion Quantum Computing

Abstract

RF-induced micromotion in trapped ion systems is typically minimised or circumvented to avoid off-resonant couplings for adiabatic processes such as multi-ion gate operations. Non-adiabatic entangling gates (so-called `fast gates') do not require resolution of specific motional sidebands, and are therefore not limited to timescales longer than the trapping period. We find that fast gates designed for micromotion-free environments have significantly reduced fidelity in the presence of micromotion. We show that when fast gates are designed to account for the RF-induced micromotion, they can, in fact, out-perform fast gates in the absence of micromotion. The state-dependent force due to the laser induces energy shifts that are amplified by the state-independent forces producing the micromotion. This enhancement is present for all trapping parameters and is robust to realistic sources of experimental error. This result paves the way for fast two-qubit entangling gates on scalable 2D architectures, where micromotion is necessarily present on at least one inter-ion axis.

References in corpus (38)

• Non-Abelian Anyons and Topological Quantum Computation
• Quantum Computation with Quantum Dots
• Surface codes: Towards practical large-scale quantum computation
• The Physical Implementation of Quantum Computation
• Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
• NMR Techniques for Quantum Control and Computation
• Observation of a Many-Body Dynamical Phase Transition with a 53-Qubit Quantum Simulator
• An addressable quantum dot qubit with fault-tolerant control fidelity
• High-fidelity quantum logic gates using trapped-ion hyperfine qubits
• High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
• Josephson-Junction Qubits with Controlled Couplings
• Quantum error correction in a solid-state hybrid spin register
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• Quantum chemistry calculations on a trapped-ion quantum simulator
• Experimental Quantum Computations on a Topologically Encoded Qubit
• Observation of Entangled States of a Fully Controlled 20-Qubit System
• High fidelity spin entanglement using optimal control
• Fast and robust two-qubit gates for scalable ion trap quantum computing
• Fast quantum logic gates with trapped-ion qubits
• Quantum Simulation of Interacting Fermion Lattice Models in Trapped Ions
• Scaling Ion Trap Quantum Computation through Fast Quantum Gates
• Coherent control of trapped ions using off-resonant lasers
• Multi-Species Trapped Ion Node for Quantum Networking
• Quantum zigzag transition in ion chains
• Robustness of composite pulses to time-dependent control noise
• Demonstration of two-atom entanglement with ultrafast optical pulses
• Modes of Oscillation in Radiofrequency Paul Traps
• Fault-tolerant quantum computation with asymmetric Bacon-Shor codes
• Operation of a planar-electrode ion-trap array with adjustable RF electrodes
• Subspace benchmarking high-fidelity entangling operations with trapped ions
• Scaling Trapped Ion Quantum Computers Using Fast Gates and Microtraps
• Fast gates for ion traps by splitting laser pulses
• Trapped ion scaling with pulsed fast gates
• High Fidelity Quantum Gates for Trapped Ions under Micromotion
• A Study on Fast Gates for Large-Scale Quantum Simulation with Trapped Ions
• Micromotion-enabled improvement of quantum logic gates with trapped ions
• Ultrafast coherent excitation of a Ca${}^{+}$ ion
• Stability thresholds and calculation techniques for fast entangling gates on trapped ions

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• Harmonic dual dressing of spin one-half systems
• Fast mixed-species quantum logic gates for trapped-ion quantum networks
• High-speed and high-connectivity two-qubit gates in long chains of trapped ions
• Error-Resilient Fast Entangling Gates for Scalable Ion-Trap Quantum Processors