Demonstration of two-atom entanglement with ultrafast optical pulses

Abstract

We demonstrate quantum entanglement of two trapped atomic ion qubits using a sequence of ultrafast laser pulses. Unlike previous demonstrations of entanglement mediated by the Coulomb interaction, this scheme does not require confinement to the Lamb-Dicke regime and can be less sensitive to ambient noise due to its speed. To elucidate the physics of an ultrafast phase gate, we generate a high entanglement rate using just 10 pulses, each of $\sim 20$ ps duration, and demonstrate an entangled Bell-state with $(76\pm 1)$% fidelity. These results pave the way for entanglement operations within a large collection of qubits by exciting only local modes of motion.

References in corpus (18)

• Multi-particle entanglement of hot trapped ions
• Demonstration of a small programmable quantum computer with atomic qubits
• High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
• High-fidelity quantum logic gates using trapped-ion hyperfine qubits
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• Realization of a scalable Shor algorithm
• Manipulation and Detection of a Trapped Yb+ Ion Hyperfine Qubit
• High-fidelity readout of trapped-ion qubits
• Fast and robust two-qubit gates for scalable ion trap quantum computing
• Ultrafast Gates for Single Atomic Qubits
• Scaling Ion Trap Quantum Computation through Fast Quantum Gates
• Ultrafast Spin-Motion Entanglement and Interferometry with a Single Atom
• Active Stabilization of Ion Trap Radiofrequency Potentials
• Quantum Control of Qubits and Atomic Motion Using Ultrafast Laser Pulses
• Fast phase gates with trapped ions
• High resolution adaptive imaging of a single atom
• Sensing Atomic Motion from the Zero Point to Room Temperature with Ultrafast Atom Interferometry
• Fast gates for ion traps by splitting laser pulses

Cited by in corpus (46)

• Trapped-Ion Quantum Computing: Progress and Challenges
• Quantum chemistry calculations on a trapped-ion quantum simulator
• Fast quantum logic gates with trapped-ion qubits
• Focus beyond quadratic speedups for error-corrected quantum advantage
• Quantum computers as universal quantum simulators: state-of-art and perspectives
• Noisy intermediate-scale quantum computers
• Ultrafast energy exchange between two single Rydberg atoms on the nanosecond timescale
• Sub-microsecond entangling gate between trapped ions via Rydberg interaction
• Fast multi-qubit gates through simultaneous two-qubit gates
• Observation of Hopping and Blockade of Bosons in a Trapped Ion Spin Chain
• Theory of robust multi-qubit non-adiabatic gates for trapped-ions
• Transversality and lattice surgery: exploring realistic routes towards coupled logical qubits with trapped-ion quantum processors
• Fault-tolerant protection of near-term trapped-ion topological qubits under realistic noise sources
• Scaling Trapped Ion Quantum Computers Using Fast Gates and Microtraps
• Breaking the entangling gate speed limit for trapped-ion qubits using a phase-stable standing wave
• Precise pulse shaping for quantum control of strong optical transitions
• Robust two-qubit trapped ions gates using spin-dependent squeezing
• Trapped Rydberg ions: a new platform for quantum information processing
• Ultrafast coherent excitation of a Ca${}^{+}$ ion
• Shuttling of Rydberg ions for fast entangling operations
• Suppressed spontaneous emission for coherent momentum transfer
• Micromotion-Enhanced Fast Entangling Gates For Trapped Ion Quantum Computing
• Entangling gates for trapped-ion quantum computation and quantum simulation
• Three-dimensional matter-wave interferometry of a trapped single ion
• Fast multi-qubit global-entangling gates without individual addressing of trapped ions
• Atomic spin-wave control and spin-dependent kicks with shaped subnanosecond pulses
• Multi-GHz repetition rate, multi-watt average power, ultraviolet laser pulses for fast trapped-ion entanglement operations
• Fast entangling gates in long ion chains
• Probing phases of quantum matter with an ion-trap tensor-network quantum eigensolver
• Strong-coupling quantum logic of trapped ions
• A two-dimensional architecture for fast large-scale trapped-ion quantum computing
• Generation and stabilization of Bell states via repeated projective measurements on a driven ancilla qubit
• Optical Two-dimensional Coherent Spectroscopy of Cold Atoms
• Scalable quantum computation with fast gates in two-dimensional microtrap arrays of trapped ions
• Correction Formulas for the Mølmer-Sørensen Gate Under Strong Driving
• Fast mixed-species quantum logic gates for trapped-ion quantum networks
• Precision Polarization Tuning for Light Shift Mitigation in Trapped-Ion Qubits
• A photonic engine fueled by quantum-correlated atoms
• Generally noise-resilient quantum gates for trapped-ions
• Ultrafast coherent excitation of an Ytterbium ion with single laser pulses
• Cold ion beam in a storage ring as a platform for large-scale quantum computers and simulators: challenges and directions for research and development
• High-speed and high-connectivity two-qubit gates in long chains of trapped ions
• Pulse optimization for high-precision motional-mode characterization in trapped-ion quantum computers
• Error-Resilient Fast Entangling Gates for Scalable Ion-Trap Quantum Processors
• Quantum computing architecture with Rydberg gates in trapped ions
• Quantum Computation