Witnessing quantum entanglement in ensembles of nitrogen-vacancy centers coupled to a superconducting resonator

被引：15
作者：
Maleki, Yusef [1 ]
Zheltikov, Aleksei M. [1 ,2 ,3 ,4 ,5 ]
机构：
[1] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA
[2] Moscow MV Lomonosov State Univ, Phys Dept, Ctr Int Laser, Moscow 119992, Russia
[3] Russian Quantum Ctr, Ul Novaya 100, Skolkovo 143025, Moscow Region, Russia
[4] AN Tupolev Kazan Natl Res Tech Univ, Kazan Quantum Ctr, Kazan 420126, Russia
[5] Kurchatov Inst Natl Res Ctr, Moscow 123182, Russia
来源：
OPTICS EXPRESS | 2018年 / 26卷 / 14期
基金：
俄罗斯科学基金会; 俄罗斯基础研究基金会;
关键词：
MULTIPARTITE ENTANGLEMENT; STATE; GENERATION; DYNAMICS; QUBITS; CAVITY; FIELDS;
D O I：
10.1364/OE.26.017849
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A hybrid quantum device consisting of three ensembles of nitrogen-vacancy centers (NVEs) whose spins are collectively coupled to a superconducting coplanar waveguide resonator is shown to enable the generation of controllable tripartite macroscopic entangled states. The density matrix of such NVEs can be encoded to recast a three-qubit system state, which can be characterized in terms of the entanglement witnesses in relation to the Greenberger-Horne-Zeilinger (GHZ) states. We identify the parameter space within which the generated entangled states can have an arbitrarily large overlap with GHZ states, indicating an enhanced entanglement in the system. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：17849 / 17858
页数：10
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