One Atomic Beam as a Detector of Classical Harmonic Vibrations with Micro Amplitudes and Low Frequencies

TL;DR

This paper introduces a simple atomic beam detector capable of sensing micro amplitude, low frequency harmonic vibrations with zero quantum noise fluctuation, offering advantages over traditional interferometers.

Contribution

The paper presents a novel atomic beam detector that can detect both longitudinal and transverse harmonic vibrations with zero quantum noise fluctuation.

Findings

Suitable for detecting micro amplitude, low frequency vibrations

Quantum noise fluctuation of the atomic beam is exactly zero

Compatible with both longitudinal and transverse harmonic waves

Abstract

We propose a simplest detector of harmonic vibrations with micro amplitudes and low frequencies, i.e. the detector consisting of one atomic beam. Here the atomic beam is induced by a plane harmonic wave and has a classical collective harmonic vibrations, which vibrant directions are perpendicular to the wave vectors of atomic beam. Compared with the detector consisting of atomic Mach-Zehnder interferometer, the new detector has two advantages: (1) it is suitable for the detection of the harmonic vibrations induced either by a longitudinal plane harmonic wave or by a transverse plane harmonic wave; (2) the quantum noise fluctuation of the atomic beam is exactly zero.