Quantum Dynamics of Topologically Nontrivial Systems with Coulomb Blockade Effects

具有库仑封锁效应的拓扑非平凡系统的量子动力学

• 批准号: 386844999
• 负责人: Dr. Ivan Khaymovich, Ph.D.
• 金额: --
• 依托单位: Institute for Physics of Microstructurs
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/386844999?language=en
• 关键词: Quantum; Dynamics; Topologically; Nontrivial; Systems

Under this project we plan to develop theoretical description of quantum dynamics of hybrid superconducting systems where charge transport properties are governed both by Coulomb blockade of electron tunneling and by nontrivial topology of superconducting state. The simplest example of a system where the interplay of a charge state and topology of superconducting phase manifests itself is a single-electron turnstile with a superconducting island and normal electrodes placed in time-dependent magnetic field. The resulting correlation of the charge tunneling and the entrance/exit of vortices in a superconductor leads to nontrivial magnetoelectric effects. Besides, vortex state alternation influences significantly relaxation processes of quasiparticles in superconducting parts. This effect has been investigated in such systems as electronic turnstiles and coolers, superconducting qubits and resonators in several recent experiments. Development of an adequate theory of quasiparticle dynamics, their tunneling into vortex states in Coulomb blockade regime seems to us a relevant problem, which is essential for the description of these experiments, as well as for possible applications in the field of quantum computing based on localized Andreev states in superconductors.

在这个项目中，我们计划发展混合超导系统的量子动力学的理论描述，其中电荷输运性质由电子隧穿的库仑阻塞和超导态的非平凡拓扑结构决定。最简单的例子，一个系统的电荷状态和超导相的拓扑结构的相互作用表现本身是一个单电子旋转门与超导岛和正常电极放置在随时间变化的磁场。由此产生的相关性的电荷隧道和入口/出口的涡旋在超导体中导致非平凡的磁电效应。此外，涡旋态的变化对超导体中准粒子的弛豫过程有显著的影响。在最近的几个实验中，这种效应已经在电子旋转门和冷却器，超导量子比特和谐振器等系统中进行了研究。准粒子动力学理论的发展，在库仑阻塞制度的涡旋态隧穿似乎对我们来说是一个相关的问题，这是必不可少的描述这些实验，以及在量子计算领域的可能应用的基础上本地化的Andreev状态在超导体。

项目成果

Time-reversal symmetric Crooks and Gallavotti–Cohen fluctuation relations in driven classical Markovian systems

驱动经典马尔可夫系统中的时间反演对称 Crooks 和 GallavottiâCohen 涨落关系

• DOI: 10.1088/1742-5468/ab11c1
• 发表时间: 2019
• 期刊: Journal of Statistical Mechanics: Theory and Experiment
• 作者: A. Mandaiya;I. M. Khaymovich
• 通讯作者: I. M. Khaymovich

Interplay of the Inverse Proximity Effect and Magnetic Field in Out-of-Equilibrium Single-Electron Devices

非平衡单电子器件中逆邻近效应与磁场的相互作用

• DOI: 10.1103/physrevapplied.7.054021
• 发表时间: 2017
• 期刊: Physical Review Applied
• 影响因子: 4.6
• 作者: S. Nakamura;Y. A. Pashkin;M. Taupin;V. F. Maisi;I. M. Khaymovich;A. S. Mel’nikov;J. T. Peltonen;J. P. Pekola;Y. Okazaki;S. Kashiwaya;S. Kawabata;A. S. Vasenko;J.-S. Tsai;N.-H. Kaneko
• 通讯作者: N.-H. Kaneko

Extreme reductions of entropy in an electronic double dot

• DOI: 10.1103/physrevb.99.115422
• 发表时间: 2017-12
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Shilpi Singh;'Edgar Rold'an;I. Neri;Ivan M Khaymovich;D. Golubev;V. Maisi;J. Peltonen;F. Julicher;J. Pekola

Universal First-Passage-Time Distribution of Non-Gaussian Currents.

• DOI: 10.1103/physrevlett.122.230602
• 发表时间: 2018-09
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: Shilpi Singh;Paul Menczel;D. Golubev;Ivan M Khaymovich;J. Peltonen;C. Flindt;Keiji Saito;É. Roldán;J. Pekola

Higgs modes in proximized superconducting systems

近似超导系统中的希格斯模式

• DOI: 10.1103/physrevb.100.104515
• 发表时间: 2019
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: V. L. Vadimov;I. M. Khaymovich;A. S. Mel’nikov
• 通讯作者: A. S. Mel’nikov