Optical and spin-optical superpositions modulated by Aharonov-Bohm effect

TL;DR

This paper demonstrates the transfer of the Aharonov-Bohm phase from a spintronic device to quantum optical states, enabling control of quantum states via topological effects for potential quantum information applications.

Contribution

It introduces a method to transfer AB phase from a topological spin transistor to optical superpositions, combining spintronics and quantum optics in a novel way.

Findings

AB phase can be transferred to coherent state superpositions.

The phase parameter controls qubit state rotation.

Optical states can be modulated by AB effect under measurement.

Abstract

Generation of Aharonov-Bohm (AB) phase has achieved a state-of-the-art in mesoscopic systems with manipulation and control of the AB effect. The possibility of transfer information enconded in such systems to non-classical states of light increases the possible scenarios where the information can be manipulated and transfered. In this paper we propose a quantum transfer of the AB phase generated in a spintronic device, a topological spin transistor (TST), to an quantum optical device, a coherent state superposition in high-Q cavity and discuss optical and spin-optical superpositions in the presence of an AB phase. We demonstrate that the AB phase generated in the TST can be transfered to the coherent state superposition, considering the interaction with the spin state and the quantum optical manipulation of the coherent state superposition. We show that these cases provide examples of two-qubit states modulated by AB effect and that the phase parameter can be used to control the degree of rotation of the qubit state. We also show under a measurement on the spin basis, an optical one-qubit state that can be modulated by the AB effect. In these cases, we consider a dispesive interaction between a coherent state and a spin state with an acquired AB phase and also discuss a dissipative case where a given Lindblad equation is achieved and solved. Keywords: Quantum transfer; Aharonov-Bohm phase; Spintronics; Quantum Optical Devices.