Transport Spectroscopy of a Spin-Coherent Dot-Cavity System

被引：27

作者：

Roessler, C. ^{[1
]}

Oehri, D. ^{[1
]}

Zilberberg, O. ^{[1
]}

Blatter, G. ^{[1
]}

Karalic, M. ^{[1
]}

Pijnenburg, J. ^{[1
]}

Hofmann, A. ^{[1
]}

Ihn, T. ^{[1
]}

Ensslin, K. ^{[1
]}

Reichl, C. ^{[1
]}

Wegscheider, W. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Solid State Phys Lab, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 16期

基金：

瑞士国家科学基金会;

关键词：

QUANTUM DOTS; KONDO; IMPURITY; BOX;

D O I：

10.1103/PhysRevLett.115.166603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum engineering requires controllable artificial systems with quantum coherence exceeding the device size and operation time. This can be achieved with geometrically confined low-dimensional electronic structures embedded within ultraclean materials, with prominent examples being artificial atoms (quantum dots) and quantum corrals (electronic cavities). Combining the two structures, we implement a mesoscopic coupled dot-cavity system in a high-mobility two-dimensional electron gas, and obtain an extended spin-singlet state in the regime of strong dot-cavity coupling. Engineering such extended quantum states presents a viable route for nonlocal spin coupling that is applicable for quantum information processing.

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