Multistability and spin diffusion enhanced lifetimes in dynamic nuclear polarization in a double quantum dot

F. Forster; M. Muehlbacher; D. Schuh; W. Wegscheider; G. Giedke; S. Ludwig

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Multistability and spin diffusion enhanced lifetimes in dynamic nuclear polarization in a double quantum dot

机译：多重稳定性和自旋扩散提高了双量子点中动态核极化的寿命

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The control of nuclear spins in quantum dots is essential to explore their many-body dynamics and exploit their prospects for quantum information processing. We present a unique combination of dynamic nuclear spin polarization and electric-dipole-induced spin resonance in an electrostatically defined double quantum dot (DQD) exposed to the strongly inhomogeneous field of two on-chip nanomagnets. Our experiments provide direct and unrivaled access to the nuclear spin polarization distribution and allow us to establish and characterize multiple fixed points. Further, we demonstrate polarization of the DQD environment by nuclear spin diffusion which significantly stabilizes the nuclear spins inside the DQD.

机译：量子点中核自旋的控制对于探索其多体动力学和开发其量子信息处理前景至关重要。我们在暴露于两个片上纳米磁铁的强烈非均匀场的静电定义双量子点（DQD）中，提出了动态核自旋极化和电偶极子诱发的自旋共振的独特组合。我们的实验为核自旋极化分布提供了直接而无与伦比的途径，使我们能够建立和表征多个固定点。此外，我们通过核自旋扩散证明了DQD环境的极化，这极大地稳定了DQD内部的核自旋。

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来源
《Physical review》 |2015年第24期|245303.1-245303.5|共5页
作者
F. Forster; M. Muehlbacher; D. Schuh; W. Wegscheider; G. Giedke; S. Ludwig;
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作者单位

Center for NanoScience and Fakultaet fuer Physik, LMU-Munich, 80539 Muenchen, Germany;

Center for NanoScience and Fakultaet fuer Physik, LMU-Munich, 80539 Muenchen, Germany;

Fakultaet fuer Physik, Universitaet Regensburg, 93040 Regensburg, Germany;

Solid State Physics Laboratory, ETH Zurich, 8093 Zurich, Switzerland;

Max-Planck-Institut fuer Quantenoptik, 85748 Garching, Germany,IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain,Donostia International Physics Center, 20018 San Sebastian, Spain;

Center for NanoScience and Fakultaet fuer Physik, LMU-Munich, 80539 Muenchen, Germany,Paul-Drude-Institut fuer Festkoerperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany;

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正文语种 eng
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current-driven spin pumping; quantum information; quantum dots;

机译：电流驱动的自旋泵浦;量子信息量子点;

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专利

1. Self-Polarization and Dynamical Cooling of Nuclear Spins in Double Quantum Dots [J] . M. S. Rudner, L. S. Levitov Physical review letters . 2007,第3期

机译：双量子点中核自旋的自极化和动态冷却
2. Temperature-dependent dynamical nuclear polarization bistabilities in double quantum dots in the spin-blockade regime [J] . Anders Mathias Lunde, Carlos Lopez-Monis, Ioanna A. Vasiliadou, Physical review . 2013,第3期

机译：自旋封锁体系中双量子点中温度相关的动态核极化双稳态
3. Effect Of Nuclear Polarization On Spin Dynamics In A Double Quantum Dot [J] . J. Saerkkae, A. Harju Physical review . 2009,第8期

机译：核极化对双量子点自旋动力学的影响
4. Dynamic nuclear polarization and Hanle effect in (In,Ga)As/GaAs quantum dots. Role of nuclear spin fluctuations [C] . I. Ya. Gerlovin, R. V. Cherbunin, I. V. Ignatiev, ICPS 2012 . 2013

机译：在（In，Ga）AS / GaAs量子点中的动态核极化和Hanle效应。核自旋波动的作用
5. Spin Polarization and Dynamics of DMS Colloidal Quantum Dots [D] . Delikanli, Savas 2011

机译：DMS胶体量子点的自旋极化和动力学
6. Quenching of dynamic nuclear polarization by spin–orbit coupling in GaAs quantum dots [O] . John M. Nichol, Shannon P. Harvey, Michael D. Shulman, -1

机译：GaAs量子点中自旋轨道耦合对动态核极化的猝灭
7. Multistability and spin diffusion enhanced lifetimes in dynamic nuclear polarization in a double quantum dot [O] . Forster, F., Mühlbacher, M., Schuh, D., 2015

机译：多稳态和自旋扩散增强了双量子点中动态核极化的寿命

Multistability and spin diffusion enhanced lifetimes in dynamic nuclear polarization in a double quantum dot

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