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- Title
High fidelity quantum state transfer in electromechanical systems with intermediate coupling.
- Authors
Jian Zhou; Yong Hu; Zhang-qi Yin; Wang, Z. D.; Shi-Liang Zhu; Zheng-Yuan Xue
- Abstract
Hybrid quantum systems usually consist of two or more subsystems, which may take the advantages of the different systems. Recently, the hybrid system consisting of circuit electromechanical subsystems have attracted great attention due to its advanced fabrication and scalable integrated photonic circuit techniques. Here, we propose a scheme for high fidelity quantum state transfer between a superconducting qubit and a nitrogen-vacancy center in diamond, which are coupled to a superconducting transmission-line resonator with coupling strength g1 and a nanomechanical resonator with coupling strength g2, respectively. Meanwhile, the two resonators are parametrically coupled with coupling strength J. The system dynamics, including the decoherence effects, is numerical investigated. It is found that both the small (J⪡{g1,g2}) and large (J⪢{g1,g2}) coupling regimes of this hybrid system can not support high fidelity quantum state transfer before significant technique advances. However, in the intermediate coupling regime (J~ g1,g2), in contrast to a conventional wisdom, high fidelity quantum information transfer can be implemented, providing a promising route towards high fidelity quantum state transfer in similar coupled resonators systems.
- Subjects
QUANTUM mechanics; ELECTROMECHANICAL technology; ELECTROMECHANICAL devices; FABRICATION (Manufacturing); SUPERCONDUCTING transmission lines
- Publication
Scientific Reports, 2014, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep06237