Turnplate of quantum state

TL;DR

This paper introduces a quantum state turnplate concept in a ring system with time-reversal asymmetry, enabling directional quantum state transfer and potential quantum routing in networks.

Contribution

It proposes a novel quantum state turnplate model based on time-reversal asymmetry and suggests implementation in coupled resonator optical waveguides.

Findings

System behaves as a quantum state turnplate under certain parameters

Directional quantum state transfer can be achieved

Potential application as quantum routers in networks

Abstract

Time-reversal symmetry breaking can enhance or suppress the probability of success for quantum state transfer (QST), and remarkably it can be used to implement the directional QST. In this paper we study the QST on a ring with time-reversal asymmetry. We show that the system will behave as a quantum state turnplate under some proper parameters, which may serve as time controlled quantum routers in complex quantum networks. We propose to to realize the quantum state turnplate in the coupled resonator optical waveguide by controlling the coupling strength and the phase.