Detection of Particles Under Potential Barrier

TL;DR

This paper presents a novel quantum detector model capable of registering particles passing through a potential barrier without significantly disturbing their wave functions, enabling observation of particle trajectories in classically forbidden regions.

Contribution

The paper introduces a new detector model that can detect particles under a potential barrier without perturbing their wave functions, allowing for direct observation of tunneling particles.

Findings

Detector operates in classically forbidden regions

Particles passing through barriers can be registered

Observation of particle tracks under the barrier is feasible

Abstract

We introduce a model detector which registers the passage of a particle through the detector location, without substantially perturbing the particle wave function. (The exact time of passage is not determined in such measurements.) We then show that our detector can operate in a classically forbidden region and register particles passing through a certain point under a potential barrier. We show that it should be possible to observe the particle's track under the barrier.