Free-space lossless state-detection of a single trapped atom

Abstract

We demonstrate the lossless state-selective detection of a single rubidium 87 atom trapped in an optical tweezer. This detection is analogous to the one used on trapped ions. After preparation in either a dark or bright state, we probe the atom internal state by sending laser light that couples an excited state to the bright state only. The laser induced fluorescence is collected by a high numerical aperture lens. The single-shot fidelity of the detection is 98.6(0.2) % and is presently limited by the dark count noise of the detector. The simplicity of this method opens new perspectives in view of applications to quantum manipulations of neutral atoms.

4 pages, 4 figures

References in corpus (10)

• Many-Body Physics with Ultracold Gases
• Quantum Computing
• 'Designer atoms' for quantum metrology
• Energy distribution and cooling of a single atom in an optical tweezer
• Coherence properties and quantum state transportation in an optical conveyor belt
• Cavity-based single atom preparation and high-fidelity hyperfine state readout
• Diffraction limited optics for single atom manipulation
• Fast Quantum State Control of a Single Trapped Neutral Atom
• Lossless State Detection of Single Neutral Atoms
• Nondestructive Fluorescent State Detection of Single Neutral Atom Qubits

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