Generation of a macroscopic entangled coherent state using quantum memories in circuit QED

Year: 2016

Type: article

Abstract: W-type entangled states can be used as quantum channels for, e.g., quantum teleportation, quantum dense coding, and quantum key distribution. In this work, we propose a way to generate a macroscopic W-type entangled coherent state using quantum memories in circuit QED. The memories considered here are nitrogen-vacancy center ensembles (NVEs), each located in a different cavity. This proposal does not require initially preparing each NVE in a coherent state instead of a ground state, which should significantly reduce its experimental difficulty. For most of the operation time, each cavity remains in a vacuum state, thus decoherence caused by the cavity decay and the unwanted inter-cavity crosstalk are greatly suppressed. Moreover, only one external-cavity coupler qubit is needed, which simplifies the circuit.

Source: Scientific Reports

DOI: 10.1038/srep32004

Authors: Tong Liu, Qi-Ping Su, Shao-Jie Xiong, Jin-Ming Liu, Chui-Ping Yang, Franco Nori

Institutions: Hangzhou Normal University, East China Normal University, University of Michigan, RIKEN, RIKEN Center for Emergent Matter Science

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

Funders: John Templeton Foundation, Natural Science Foundation of Shanghai, National Natural Science Foundation of China, Hangzhou Normal University, Multidisciplinary University Research Initiative, Japan Society for the Promotion of Science, RIKEN, National Key Research and Development Program of China, Air Force Office of Scientific Research, Natural Science Foundation of Zhejiang Province

OpenAlex ID: W2346198920