Quantum Faraday Effect in Double-Dot Aharonov-Bohm Ring

Abstract

We investigate Faraday's law of induction manifested in the quantum state of Aharonov-Bohm loops. In particular, we propose a flux-switching experiment for a double-dot AB ring to verify the phase shift induced by Faraday's law. We show that the induced {\em Faraday phase} is geometric and nontopological. Our study demonstrates that the relation between the local phases of a ring at different fluxes is not arbitrary but is instead determined by Faraday's inductive law, which is in strong contrast to the arbitrary local phase of an Aharonov-Bohm ring for a given flux.

Submitted to Phys. Rev. Lett

References in corpus (3)

• Quantum state engineering with Josephson-junction devices
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Tomographic measurements on superconducting qubit states

Cited by in corpus (1)

• Local Geometric Phase and Quantum State Tomography in a Superconducting Qubit