Qubit residence time measurements with a Bose-Einstein condensate

TL;DR

This paper proposes a method to measure the time a qubit spends in a particular state using a Bose-Einstein condensate, analyzing different measurement regimes and discussing a novel Zeno effect.

Contribution

It introduces a new approach to measure qubit residence time with a Bose-Einstein condensate and explores the measurement regimes and Zeno effects involved.

Findings

Analysis of strong, medium, and weak measurement regimes.

Discussion of a new type of Zeno effect.

Highlighting the analogy between residence and traversal times.

Abstract

We show that an electrostatic qubit located near a Bose-Einstein condensate trapped in a symmetric double-well potential can be used to measure the duration the qubit has spent in one of its quantum states. The stronq, medium and weak measurement regimes are analysed and a new type of Zeno effect is discussed. The analogy between the residence and the traversal (tunnelling) times is highlighted.