# Exotic looped trajectories via quantum marking

## TL;DR

This paper analytically studies exotic looped trajectories in a quantum-marked double-slit setup, identifying conditions for their interference patterns and proposing an alternative experimental scheme.

## Contribution

It introduces a theoretical framework for observing exotic looped trajectories using quantum marking with Rydberg atoms and superconducting cavities.

## Key findings

- Identification of conditions for ELT interference patterns
- Quantitative analysis for Rubidium atoms
- Proposal of an alternative experimental scheme

## Abstract

We provide an analytical and theoretical study of exotic looped trajectories (ELTs) in a double-slit interferometer with quantum marking. We use an excited Rydberg-like atom and which-way detectors such as superconducting cavities, just as in the Scully-Englert-Walther interferometer. We indicate appropriate conditions on the atomic beam or superconducting cavities so that we determine an interference pattern and fringe visibility exclusive from the ELTs. We quantitatively describe our results for Rubidium atoms and propose this framework as an alternative scheme to the double-slit experiment modified to interfere only these exotic trajectories.