Quantum electrodynamic Aharonov-Bohm effect of charge qubit

TL;DR

This paper predicts a force-free Aharonov-Bohm effect in a superconducting charge qubit influenced by quantum electrodynamics, revealing novel phenomena like vacuum Rabi splitting and Lamb shift in electromagnetic-field-free regions.

Contribution

It introduces a new quantum electrodynamic Aharonov-Bohm effect in charge qubits, combining nonlocal interactions with observable quantum phenomena.

Findings

Observation of vacuum Rabi splitting and oscillation

Detection of Lamb shift in a field-free region

Proposed experimental verification method

Abstract

We predict that a charge under the influence of a quantum electrodynamic potential exhibits a force-free Aharonov-Bohm effect. The specific system considered in this study is a superconducting charge qubit nonlocally interacting with a cavity electromagnetic field. We find that this nonlocal interaction gives rise to remarkable quantum electrodynamic phenomena such as vacuum Rabi splitting and oscillation, and Lamb shift, under the condition that the qubit is located in an electromagnetic-field-free region. Our result can be verified in a realistic experimental setup, and provides a new approach of investigating the Aharonov-Bohm effect combined with quantum electrodynamics.