Coherent spin control of a nanocavity-enhanced qubit in diamond

被引：154

作者：

Li, Luozhou ^{[1
]}

Schroeder, Tim ^{[1
]}

Chen, Edward H. ^{[1
]}

Walsh, Michael ^{[1
]}

Bayn, Igal ^{[1
]}

Goldstein, Jordan ^{[1
]}

Gaathon, Ophir ^{[1
]}

Trusheim, Matthew E. ^{[1
]}

Lu, Ming ^{[2
]}

Mower, Jacob ^{[1
]}

Cotlet, Mircea ^{[2
]}

Markham, Matthew L. ^{[3
]}

Twitchen, Daniel J. ^{[3
]}

Englund, Dirk ^{[1
]}

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[2] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[3] Element Six, Santa Clara, CA 95054 USA

来源：

Nature Communications | 2015年 / 6卷

关键词：

PHOTONIC CRYSTAL CAVITY; NITROGEN-VACANCY CENTERS; COLOR-CENTER; ENTANGLEMENT; ATOM;

D O I：

10.1038/ncomms7173

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A central aim of quantum information processing is the efficient entanglement of multiple stationary quantum memories via photons. Among solid-state systems, the nitrogen-vacancy centre in diamond has emerged as an excellent optically addressable memory with second-scale electron spin coherence times. Recently, quantum entanglement and teleportation have been shown between two nitrogen-vacancy memories, but scaling to larger networks requires more efficient spin-photon interfaces such as optical resonators. Here we report such nitrogen-vacancy-nanocavity systems in the strong Purcell regime with optical quality factors approaching 10,000 and electron spin coherence times exceeding 200 mu s using a silicon hard-mask fabrication process. This spin-photon interface is integrated with on-chip microwave striplines for coherent spin control, providing an efficient quantum memory for quantum networks.

引用

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