Quantum-noise quenching in atomic tweezers

TL;DR

This paper investigates a laser-based protocol for extracting single atoms from an ultracold bosonic reservoir, demonstrating how quantum noise can be suppressed to improve efficiency in atomic tweezer applications.

Contribution

It introduces a method to quench quantum noise in atomic tweezers, enabling high-efficiency single-atom extraction by controlling laser pulse duration.

Findings

Quantum noise can be suppressed with sufficiently long laser pulses.

High transfer efficiency into single-atom ground state is achievable.

Protocol is suitable for initializing quantum registers with neutral atoms.

Abstract

The efficiency of extracting single atoms or molecules from an ultracold bosonic reservoir is theoretically investigated for a protocol based on lasers, coupling the hyperfine state in which the atoms form a condensate to another stable state, in which the atom experiences a tight potential in the regime of collisional blockade, the quantum tweezers. The transfer efficiency into the single-atom ground state of the tight trap is fundamentally limited by the collective modes of the condensate, which are thermally and dynamically excited. The noise due to these excitations can be quenched for sufficiently long laser pulses, thereby achieving high efficiencies. These results show that this protocol can be applied for initializing a quantum register based on tweezer traps for neutral atoms.