Work

Protected quantum-state transfer in decoherence-free subspaces

Year: 2015

Type: article

Abstract: We propose and analyze a robust quantum-state transfer protocol by the use of a combination of coherent quantum coupling and decoherence-free subspaces in a coupled quantum spin chain. Under decoherence, an arbitrary unknown quantum state embedded in a decoherence-free subspace can be perfectly transferred through a noisy channel being weakly coupled to two end registers. The method protects quantum information from both the channel noise and the environmental decoherence. A special case of utilizing two physical qubits to encode one logical qubit is considered as an example and the robustness is confirmed by numerical performances.

Source: Physical Review A

DOI: 10.1103/physreva.91.042303

Authors: Wei Qin, Chuan Wang, Xiangdong Zhang

Institutions: Beijing Institute of Technology, Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: National Natural Science Foundation of China

Awards: 基于耦合光学微腔体系的量子通信器件研究, G3382085229