Spatial two-particle NOON-states in periodically shaken three-well potentials

TL;DR

This paper demonstrates how periodic shaking of a three-well potential can generate high-fidelity spatial NOON-states for two particles, with implications for quantum interferometry and decoherence studies.

Contribution

It introduces a numerical method to enhance NOON-state fidelity in a three-well system using periodic shaking, highlighting potential for experimental realization.

Findings

Periodic shaking increases NOON-state fidelity

Return probability distinguishes quantum from mixed states

Decoherence effects differ from pure quantum dynamics

Abstract

Few-particle dynamics in a three-well potential are investigated numerically. It is shown that periodically shaking the potential can considerably increase the fidelity of emerging spatial quantum superpositions. Such NOON-states are important for quantum interferometry. If the two particles initially sit in the middle well, the probability to return to this state can distinguish pure quantum dynamics from statistical mixtures. The numeric implementation of decoherence via particle losses shows clear differences from the pure quantum behaviour. A three-well lattice could be an ideal system for experimental realisations.