A crossed vortex bottle beam trap for single-atom qubits

TL;DR

This paper presents a novel crossed vortex bottle beam trap for single Cesium atoms, enabling stable trapping and quantum control with long coherence times, advancing quantum information processing capabilities.

Contribution

The work introduces a new trap design using crossing vortex beams for improved stability and coherence in single-atom quantum experiments.

Findings

Achieved 50% loading probability from a magneto-optical trap.

Demonstrated trapping lifetime of up to 6 seconds.

Observed Rabi oscillations with a coherence time of approximately 43 ms.

Abstract

We demonstrate trapping and quantum state control of single Cesium atoms in a 532 nm wavelength bottle beam trap. The three dimensional trap is formed by crossing two unit charge vortex beams. Single atoms are loaded with 50% probability directly from a magneto-optical trap. We achieve a trapping lifetime of up to 6 s, and demonstrate fast Rabi oscillations with a coherence time of $T_2\sim 43 \pm 9\rm ms$.