Ultrafast high-fidelity state readout of single neutral atom

Abstract

The capability to measure the state of a quantum system is vital to a practical quantum network, for applications including distributed quantum computing and long-distance quantum communication. As a thriving platform for quantum information technology, single neutral atoms suffer from low achievable photon scattering rate and shallow trapping potential, which limits the fidelity and speed of state readout process. Here, by coupling an single neutral atom with a high-finesse fiber-based Fabry-Pérot microcavity (FFPC) in Purcell regime, we realize strong enhancement of the atomic photoemission rate, which enables ultrafast and high-fidelity discrimination of bright and dark hyperfine states of the atom. The readout fidelity can reach 99.1(2)% within 200 ns and 99.985(8)% within 9 $\mu$s. Furthermore, we demonstrate that state preparation via optical pumping can be efficiently accelerated by real-time decision protocol based on ultrafast state readout. This work paves the way to the implementation of quantum networking protocols with high communication rate and high fidelity.

arXiv comment9 pages, 9 figures, 53 references

References in corpus (35)

• QuTiP 2: A Python framework for the dynamics of open quantum systems
• Quantum Computing with Very Noisy Devices
• Logical quantum processor based on reconfigurable atom arrays
• Cavity-based quantum networks with single atoms and optical photons
• An Elementary Quantum Network of Single Atoms in Optical Cavities
• Quantum Error Mitigation
• Nanophotonic quantum phase switch with a single atom
• Quantum repeaters: From quantum networks to the quantum internet
• Efficient long distance quantum communication
• Event-Ready Bell Test Using Entangled Atoms Simultaneously Closing Detection and Locality Loopholes
• A Quantum Gate between a Flying Optical Photon and a Single Trapped Atom
• A photon-photon quantum gate based on a single atom in an optical resonator
• Experimental device-independent quantum key distribution between distant users
• High-fidelity gates with mid-circuit erasure conversion in a metastable neutral atom qubit
• Cooling to the Ground State of Axial Motion for One Atom Strongly Coupled to an Optical Cavity
• Erasure conversion in a high-fidelity Rydberg quantum simulator
• Long-distance distribution of atom-photon entanglement at telecom wavelength
• Cavity-based single atom preparation and high-fidelity hyperfine state readout
• Ultrafast energy exchange between two single Rydberg atoms on the nanosecond timescale
• Quantum networks with neutral atom processing nodes
• A Quantum Network Node with Crossed Optical Fibre Cavities
• Mid-circuit cavity measurement in a neutral atom array
• Lossless State Detection of Single Neutral Atoms
• Towards a deterministic interface between trapped-ion qubits and travelling photons
• High Finesse Fiber Fabry-Perot Cavities: Stabilization and Mode Matching Analysis
• Strong Purcell effect on a neutral atom trapped in an open fiber cavity
• Fast non-destructive parallel readout of neutral atom registers in optical potentials
• Stern-Gerlach detection of neutral atom qubits in a state dependent optical lattice
• Fast Excitation and Photon Emission of a Single-Atom-Cavity System
• Scalable multilayer architecture of assembled single-atom qubit arrays in a three-dimensional Talbot tweezer lattice
• Multiplexed telecom-band quantum networking with atom arrays in optical cavities
• Highly-efficient state-selective sub-microsecond photoionization detection of single atoms
• Single-Shot Readout of a Nuclear Spin in Silicon Carbide
• Continuously and widely tunable frequency-stabilized laser based on an optical frequency comb
• Subpicosecond $X$ rotations of atomic clock states

Cited by in corpus (5)

• A cavity array microscope for parallel single-atom interfacing
• Microsecond-scale high-survival and number-resolved detection of ytterbium atom arrays
• Volcano Architecture for Scalable Quantum Processor Units
• Fiber-coupled broadband quantum memory for polarization-encoded photonic qubits
• Efficient and controlled symmetric and asymmetric Bell-state transfers in a dissipative Jaynes-Cummings model