Topologically Protected Synthesizing of Fock States in a Circuit Quantum Electrodynamics Architecture

Author:

Xin Wei12ORCID,Yu Xiang‐min12ORCID,Zhou Kun12ORCID,Li Shaoxiong12ORCID,Yu Yang12ORCID

Affiliation:

1. National Laboratory of Solid State Microstructures School of Physics Nanjing University Nanjing 210093 China

2. Shishan Laboratory Suzhou Campus of Nanjing University Suzhou 215000 China

Abstract

The preparation of Fock states is important for quantum information storage and processing. Herein, a two‐step protocol with topological protection for multi‐photon Fock states synthesizing in a circuit quantum electrodynamics (QED) architecture is presented. Due to photon number‐dependent vacuum Rabi splitting, the dynamics of the Jaynes–Cummings ladder in the resonant regime can be equivalent to a spin‐1/2 chain while a multi‐frequency microwave pulse is applied. Based on the topologically assisted quantum state transfer (QST)technique, multi‐photon Fock states can be conditionally generated. This method significantly reduces the complexity of experimental manipulation compared with previous multi‐step methods and is more robust as a result of topological protection. Furthermore, the protocol indicates that the circuit QED architecture could potentially provide a platform to explore the exotic phase in condensed matter.

Funder

Natural Science Foundation of Jiangsu Province

National Natural Science Foundation of China

Publisher

Wiley

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