Ultrafast energy exchange between two single Rydberg atoms on the nanosecond timescale

Abstract

Rydberg atoms, with their giant electronic orbitals, exhibit dipole-dipole interaction reaching the GHz range at a distance of a micron, making them a prominent contender for realizing quantum operations well within their coherence time. However, such strong interactions have never been harnessed so far, mainly because of the stringent requirements on the fluctuation of the atom positions and the necessary excitation strength. Here, using atoms trapped in the motional ground-state of optical tweezers and excited to a Rydberg state with picosecond pulsed lasers, we observe an interaction-driven energy exchange, i.e., a Förster oscilation, occuring in a timescale of nanoseconds, two orders of magnitude faster than in any previous work with Rydberg atoms. This ultrafast coherent dynamics gives rise to a conditional phase which is the key resource for an ultrafast controlled-$Z$ gate. This opens the path for quantum simulation and computation operating at the speed-limit set by dipole-dipole interactions with this ultrafast Rydberg platform.

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• Ultrafast Many-Body Dynamics in an Ultracold Rydberg-Excited Atomic Mott Insulator
• Real-time observation of picosecond-timescale optical quantum entanglement toward ultrafast quantum information processing
• Dissipative stabilization of high-dimensional GHZ states for neutral atoms
• Reservoir-based deterministic loading of single-atom tweezer arrays
• Strong Spin-Motion Coupling in the Ultrafast Dynamics of Rydberg Atoms
• Proposal for simulating quantum spin models with the Dzyaloshinskii-Moriya interaction using Rydberg atoms and the construction of asymptotic quantum many-body scar states
• Rydberg-atom graphs for quadratic unconstrained binary optimization problems
• Ultrafast high-fidelity state readout of single neutral atom
• Rydberg Macrodimers: Diatomic molecules on the micrometer scale
• Benchmarking direct and indirect dipolar spin-exchange interactions between two Rydberg atoms
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• Generation of complete graph states in a spin-$1/2$ Heisenberg chain with a globally optimized magnetic field
• Compact optical waveform generator with digital feedback
• Long-range $CC\Phi$ gates via radio-frequency-induced Förster resonances
• Measurement and feed-forward correction of the fast phase noise of lasers
• Generation of 480 nm picosecond pulses for ultrafast excitation of Rydberg atoms
• Encoded probabilistic imaginary-time evolution on a trapped-ion quantum computer for ground and excited states of spin qubits
• Unravelling the Structures in the van der Waals Interactions of Alkali Rydberg Atoms
• Multi-Qubit Parity Gates for Rydberg Atoms in Various Configurations
• Optimization-based hologram design for fine optical tweezer arrays and extension of super-resolution criteria
• Probing spin-motion coupling of two Rydberg atoms by a Stern-Gerlach-like experiment
• Splitting of the three-body Förster resonance in Rb Rydberg atoms as a measure of dipole-dipole interaction strength
• Generation of Motional Squeezed States for Neutral Atoms in Optical Tweezers
• Narrowline cooling of dysprosium atoms in an optical tweezer array
• Quantum-enabled optical large-baseline interferometry: applications, protocols and feasibility
• Grating magneto-optical trap of cesium atoms with an additional retroreflected laser beam
• Tracking a nonrelativistic charge with an array of Rydberg atoms
• Efficient excitation transfer in an LH2-inspired nanoscale stacked ring geometry
• Exploration of Design Alternatives for Reducing Idle Time in Shor's Algorithm: A Study on Monolithic and Distributed Quantum Systems
• Resonator-assisted quantum transduction between superconducting qubits and trapped atomic systems via Rydberg levels
• A quantum search method for quadratic and multidimensional knapsack problems
• Ultrafast many-body dynamics of dense Rydberg gases and ultracold plasma
• Higgs and Nambu-Goldstone modes in a spin-1 $XY$ model with long-range interactions
• Programmable order by disorder effect and underlying phases through dipolar quantum simulators
• Optimization of conveyance of quantum particles by moving potential well