Nonlocal entanglement and noise between spin qubits induced by Majorana bound states

Autor:	Sha-Sha Ke, Yong Guo, Hai-Feng Lü, Hua-Jun Yang, Huaiwu Zhang
Rok vydání:	2015
Předmět:	Physics Quantum nonlocality MAJORANA Condensed matter physics Quantum dot Qubit Quantum mechanics General Physics and Astronomy Quantum Physics Quantum entanglement W state Spin (physics) Squashed entanglement
Zdroj:	Physics Letters A. 379:170-174
ISSN:	0375-9601
Popis:	We propose a scheme to create nonlocal entanglement between two spatially separated electron spin qubits by coupling them with a pair of Majorana bound states (MBSs). The spin qubits are based on the spins of electrons confined in quantum dots. It is shown that spin entanglement between two dots could be generated by the nonlocality of MBSs. We also demonstrate that in the transport regime, the current noise cross correlation can serve as a good indicator of spin entanglement. The Majorana-dot coupling not only induces an indirect interaction between qubits, but also produces spin localization in the strong coupling limit. These two competing effects lead to a nonmonotonic dependence of current cross-correlation and entanglement on the Majorana-qubit coupling strength.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::29d3220ed718d8fe02e9afe4835e519a https://doi.org/10.1016/j.physleta.2014.08.015 Zobrazit plný text záznamu Full Text from ScienceDirect