Two-qubit entangling gates within arbitrarily long chains of trapped ions

Abstract

Ion trap systems are a leading platform for large scale quantum computers. Trapped ion qubit crystals are fully-connected and reconfigurable, owing to their long range Coulomb interaction that can be modulated with external optical forces. However, the spectral crowding of collective motional modes could pose a challenge to the control of such interactions for large numbers of qubits. Here, we show that high-fidelity quantum gate operations are still possible with very large trapped ion crystals, simplifying the scaling of ion trap quantum computers. To this end, we present analytical work that determines how parallel entangling gates produce a crosstalk error that falls off as the inverse cube of the distance between the pairs. We also show experimental work demonstrating entangling gates on a fully-connected chain of seventeen ${}^{171}{\mathrm{Yb}}^{+}$ ions with fidelities as high as $97(1)\%$.

arXiv comment10 pages, 6 figures

References in corpus (26)

• 14-qubit entanglement: creation and coherence
• Multi-particle entanglement of hot trapped ions
• Demonstration of a small programmable quantum computer with atomic qubits
• Large Scale Modular Quantum Computer Architecture with Atomic Memory and Photonic Interconnects
• Heating of trapped ions from the quantum ground state
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• Manipulation and Detection of a Trapped Yb+ Ion Hyperfine Qubit
• Verified Quantum Information Scrambling
• Single-qubit quantum memory exceeding $10$-minute coherence time
• Complete 3-Qubit Grover Search on a Programmable Quantum Computer
• Trapped ion quantum computation with transverse phonon modes
• Optimal quantum control of multi-mode couplings between trapped ion qubits for scalable entanglement
• Parallel Entangling Operations on a Universal Ion Trap Quantum Computer
• Phase Control of Trapped Ion Quantum Gates
• Large Scale Quantum Computation in an Anharmonic Linear Ion Trap
• High-fidelity trapped-ion quantum logic using near-field microwaves
• Scalable global entangling gates on arbitrary ion qubits
• Robust two-qubit gates in a linear ion crystal using a frequency-modulated driving force
• Comparing Experiments to the Fault-Tolerance Threshold
• Bounding quantum gate error rate based on reported average fidelity
• Arbitrary-speed quantum gates within large ion crystals through minimum control of laser beams
• Phase-modulated decoupling and error suppression in qubit-oscillator systems
• Noise Analysis for High-Fidelity Quantum Entangling Gates in an Anharmonic Linear Paul Trap
• Entangling an arbitrary pair of qubits in a long ion crystal
• Quantum Computation under Micromotion in a Planar Ion Crystal
• Beat note stabilization of mode-locked lasers for quantum information processing

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